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Can vs Must - What's the difference?

can | must |

As verbs the difference between can and must

is that can is to know how to; to be able to while must is to do with certainty; indicates that the speaker is certain that the subject will have executed the predicate

As nouns the difference between can and must

is that can is a more or less cylindrical vessel for liquids, usually of steel or aluminium while must is something that is mandatory or required.

As an abbreviation Can

is an alternative spelling of Can.|lang=en.

As an initialism CAN

is the Andean Community of Nations.

can

English

(wikipedia can)

Etymology 1

From (etyl) (m) (first and third person singular of , Danish (m). More at canny, cunning.

Verb

  • To know how to; to be able to.
  • * {{quote-magazine, year=2013, month=July-August, author= Lee S. Langston, magazine=(American Scientist)
    • , title= The Adaptable Gas Turbine , passage=Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo'', meaning ''vortex , and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.}}
  • May; to be permitted or enabled to.
  • To be possible, usually with be .
  • * {{quote-book, year=1922, author=(Ben Travers)
    • , chapter=5, title= A Cuckoo in the Nest , passage=The most rapid and most seductive transition in all human nature is that which attends the palliation of a ravenous appetite.
  • To know.
  • * ca.1360-1387 , (William Langland), (Piers Plowman)
    • I can rimes of Robin Hood.
  • * ca.1360-1387 , (William Langland), (Piers Plowman)
    • I can no Latin, quod she.
  • * (William Shakespeare) (1564-1616)
    • Let the priest in surplice white, / That defunctive music can .
    Usage notes
    * For missing forms, substitute inflected forms of be able to , as: ** I might be able to go. ** I was able to go yesterday. ** I have been able to go, since I was seven. ** I had been able to go before. ** I will be able to go tomorrow. * The word could also suffices in many tenses. "I would be able to go" is equivalent to "I could go", and "I was unable to go" can be rendered "I could not go". (Unless there is a clear indication otherwise, "could verb''" means "would be able to ''verb''", but "could not ''verb''" means "was/were unable to ''verb ".) * The present tense negative can not'' is often contracted to ''cannot'' or ''can't . * The use of can'' in asking permission sometimes is criticized as being impolite or incorrect by those who favour the more formal alternative ''"may I...?" . * Can'' is sometimes used rhetorically to issue a command, placing the command in the form of a request. For instance, ''"Can you hand me that pen?"'' as a polite substitution for ''"Hand me that pen." * Some US dialects that glottalize the final /t/ in can't'' ( even when stressed.
    Synonyms
    * be able to * may
    Antonyms
    * cannot * can’t
    See also
    *

    Etymology 2

    From (etyl) canne, from (etyl) .

    Noun

    (en noun)
  • A more or less cylindrical vessel for liquids, usually of steel or aluminium.
  • A container used to carry and dispense water for plants (a watering can ).
  • A tin-plate canister, often cylindrical, for preserved foods such as fruit, meat, or fish.
  • (US, slang) toilet, bathroom.
  • (US, slang) buttocks.
  • (slang) jail or prison.
  • (slang) headphones.
  • (obsolete) A drinking cup.
    • (Shakespeare)
  • * Tennyson
    • Fill the cup and fill the can , / Have a rouse before the morn.
    Synonyms
    * (cylindrical metal container) tin
    Derived terms
    * beer can * can opener * carry the can * garbage can * kick at the can * kick the can / kick-the-can * kick the can down the road * trash can

    Verb

    (cann)
  • To preserve, by heating and sealing in a can or jar.
    • They spent August canning fruit and vegetables.
  • to discard, scrap or terminate (an idea, project, etc.).
    • He canned the whole project because he thought it would fail.
  • To shut up.
    • Can your gob.
  • (US, euphemistic) To fire or dismiss an employee.
    • The boss canned him for speaking out.

    Statistics

    *

    Anagrams

    * * * 100 English basic words English auxiliary verbs English defective verbs English irregular verbs 1000 English basic words ----

    must

    English

    Etymology 1

    From (etyl) . More at .

    Verb

    (head)
  • to do with certainty; (indicates that the speaker is certain that the subject will have executed the predicate)
    • If it has rained all day, it must be very wet outside.
    You picked one of two, and it wasn't the first: it must have been the second.
    The children must be asleep by now.
    • You must arrive in class on time. — the requirement is an imperative
    This door handle must be rotated fully. — the requirement is a directive
    Arise, and go into the city, and it shall be told thee what thou must do. (Bible, Acts 9:6)
    Quotations
    * 1936 , , More Poems , IX, lines 3-6 *: Forth I wander, forth I must , *: And drink of life again. *: Forth I must by hedgerow bowers *: To look at the leaves uncurled * 1937 J.R.R. Tolkien, The Hobbit *: We must away ere break of day *: To seek the pale enchanted gold. * 1968 Fritz Leiber, Swords in the Mist *: Whereupon while one patched or napped, the other must stand guard against inquisitive two- and three-headed dragons and even an occasional monocephalic.
    Usage notes
    * (sense) Compare with weaker auxiliary verb (should), indicating a strong probability of the predicate's execution. * (sense) Compare with weaker auxiliary verb (should), indicating mere intent for the predicate's execution; and stronger auxiliary verb (will), indicating that the negative consequence will be unusually severe. * The past tense of "must" is also "must"; however, this usage is almost always literary (see Fritz Leiber quotation above). The past sense is usually conveyed by (had to). It is possible to use (be bound to) for the past also. For this reason, (have to) and (be bound to) are also used as alternatives to (must) in the present and future. * The principal verb, if easily supplied, may be omitted. In modern usage this is mainly literary (see Housman and Tolkien quotations above). * (term) is unusual in its negation. (term) still expresses a definite certainty or requirement, with the predicate negated. (term), on the other hand, is negated in the usual manner. Compare: :: You must not' read that book. (''It '''is''' necessary that you '''not read that book. ) :: You need not' read that book. (''It '''is not necessary that you read that book. ) * The second person singular no longer adds "-est" (as it did in Old English).
    See also
    *

    Noun

    (en noun)
  • Something that is mandatory or required
    • If you'll be out all day, a map is a must .
    Synonyms
    * imperative
    Antonyms
    * no-no

    Etymology 2

    (etyl) must, most, from (etyl) mustum

    Noun

    (en noun)
  • The property of being stale or musty
  • Something that exhibits the property of being stale or musty
  • Fruit juice that will ferment or has fermented, usually grapes
  • * Longfellow
    • No fermenting must fills the deep vats.

    Verb

    (en verb)
  • To make musty.
  • To become musty.
    • External links
    * (wikipedia "must")

    Etymology 3

    (etyl) .

    Noun

  • A time during which male elephants exhibit increased levels of sexual activity and aggressiveness (also musth)
  • * 1936 , George Orwell, Shooting an Elephant'' essay in magazine ''New Writing
    • It was not, of course, a wild elephant, but a tame one which had gone ‘must’.

    Statistics

    *

    Anagrams

    * 200 English basic words English auxiliary verbs English defective verbs English irregular verbs 1000 English basic words ----