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Fathom vs Ascertain - What's the difference?

fathom | ascertain |

As verbs the difference between fathom and ascertain

is that fathom is (archaic) to encircle with outstretched arms, especially to take a measurement; to embrace while ascertain is to find out definitely; to discover or establish.

As a noun fathom

is (obsolete) grasp, envelopment, control.

fathom

English

Noun

(en noun)
  • (obsolete) Grasp, envelopment, control.
  • (nautical) A measure of length corresponding to the outstretched arms, standardised to six feet, now used mainly for measuring depths in seas or oceans.
  • (by extension) Mental reach or scope; penetration; the extent of capacity; depth of thought or contrivance.
  • * Shakespeare
  • Another of his fathom they have none / To lead their business (Othello, I.i. 151-2).

    Synonyms

    *(measure of length corresponding to the outstretched arms) brace

    Verb

    (en verb)
  • (archaic) To encircle with outstretched arms, especially to take a measurement; to embrace.
  • To measure the depth of, take a sounding of.
  • (figuratively) To get to the bottom of; to manage to comprehend (a problem etc.).
  • I can't for the life of me fathom what this means.

    Synonyms

    * fathom out, figure out, puzzle out, work out

    ascertain

    English

    Verb

    (en verb)
  • To find out definitely; to discover or establish.
  • * {{quote-book, year=1905, author=
  • , title= , chapter=1 citation , passage=“There the cause of death was soon ascertained ?; the victim of this daring outrage had been stabbed to death from ear to ear with a long, sharp instrument, in shape like an antique stiletto, which […] was subsequently found under the cushions of the hansom. […]”}}
    As soon as we ascertain what the situation is, we can plan how to proceed.

    Synonyms

    * determine * discover * establish * find out * learn * work out

    Anagrams

    *