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Must vs Let - What's the difference?

must | let |

In transitive terms the difference between must and let

is that must is to make musty while let is Used to introduce an imperative in the first or third person.

As verbs the difference between must and let

is that must is to do with certainty; indicates that the speaker is certain that the subject will have executed the predicatelet is to allow to, not to prevent (+ infinitive, but usually without {{term|to}}).

As nouns the difference between must and let

is that must is something that is mandatory or required while let is an obstacle or hindrance.

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 ----

    let

    English

    Etymology 1

    From (etyl) leten, .

    Verb

  • (label) To allow to, not to prevent (+ infinitive, but usually without (to)).
  • :
  • *(Bible), (w) viii. 28
  • *:Pharaoh said, I will let you go.
  • *(William Shakespeare) (c.1564–1616)
  • *:If your name be Horatio, as I am let to know it is
  • *1971 , , (The Tombs of Atuan)
  • *:He could not be let die of thirst there alone in the dark.
  • *{{quote-magazine, date=2013-06-21, author=(Oliver Burkeman)
    • , volume=189, issue=2, page=27, magazine=(The Guardian Weekly) , title= The tao of tech , passage=The dirty secret of the internet is that all this distraction and interruption is immensely profitable. Web companies like to boast about […], or offering services that let you "stay up to date with what your friends are doing",
  • To leave.
  • :
  • *(Edmund Spenser) (c.1552–1599)
  • *:Yet neither spins nor cards, ne cares nor frets, / But to her mother Nature all her care she lets .
  • (label) To allow the release of (a fluid).
  • :
  • (label) To allow possession of (a property etc.) in exchange for rent.
  • :
  • (label) To give, grant, or assign, as a work, privilege, or contract; often with out .
  • :
  • (label)
  • :
  • :
  • :
  • :
  • To cause (+ bare infinitive).
  • :
  • *:
    • Soo within a whyle kynge Pellinore cam with a grete hoost / and salewed the peple and the kyng / and ther was grete ioye made on euery syde / Thenne the kyng lete serche how moche people of his party ther was slayne / And ther were founde but lytel past two honderd men slayne and viij kny?tes of the table round in their pauelions
  • *1818 , (John Keats), "To—":
  • *:Time's sea hath been five years at its slow ebb, / Long hours have to and fro let creep the sand.
    • Synonyms
    * (to allow) allow, permit
    Usage notes
    The use of "let" to introduce an imperative may sometimes be confused with its use, as its own imperative , in the sense of "to allow". For example, the sentence "Let me go to the store." could either be a second-person imperative of "let" (addressing someone who might prevent the speaker from going to the store) or a first-person singular imperative of "go" (not implying any such preventer).

    Etymology 2

    (etyl) . More at late, delay.

    Verb

  • (archaic) To hinder, prevent; to obstruct (someone or something).
  • * Bible, 2. Thessalonians ii. 7
    • He who now letteth' will ' let , until he be taken out of the way.
  • * Tennyson
    • Mine ancient wound is hardly whole, / And lets me from the saddle.
  • (obsolete) To prevent or obstruct (to) do something, or (that) something happen.
  • * 1526 , (William Tyndale), trans. Bible , Acts VIII:
    • And as they went on their waye, they cam unto a certayne water, and the gelded man sayde: Se here is water, what shall lett me to be baptised?

    Noun

    (en noun)
  • An obstacle or hindrance.
  • *, II.16:
  • *:Paulus Emilius'' going to the glorious expedition of ''Macedon'', advertised the people of ''Rome'' during his absence not to speake of his actions: ''For the licence of judgements is an especiall let in great affaires.
  • *Latimer
  • *:Consider whether your doings be to the let of your salvation or not.
  • (tennis) The hindrance caused by the net during serve, only if the ball falls legally.

    • Statistics

    *

    Anagrams

    * * * 1000 English basic words English irregular past participles English irregular simple past forms English irregular verbs English terms with multiple etymologies English verbs with base form identical to past participle ----