Synonyms of fathom in English:

fathom


See definition of fathom

verb

1‘Charlie tried to fathom the expression on his friend's face’

SYNONYMS
understand, comprehend, work out, fathom out, make sense of, grasp, catch, follow, perceive, make out, penetrate, divine, search out, ferret out, puzzle out, take in, assimilate, absorb, get to the bottom of
interpret, decipher, decode, disentangle, untangle, unravel, piece together
informal make head or tail of, take on board, get a fix on, catch the drift of, get the drift of, tumble to, crack, dig, get, get the picture, get the message, see what's what
British informal twig, suss, suss out
North American informal savvy
rare cognize

2‘an attempt to fathom the ocean’

SYNONYMS
measure the depth of, sound, plumb, probe
gauge, estimate