Synonyms of unfathomable in English:

unfathomable


See definition of unfathomable

adjective

1‘the dark unfathomable eyes of a stranger’

SYNONYMS
inscrutable, incomprehensible, enigmatic, incalculable, indecipherable, obscure, esoteric, abstruse, puzzling, cryptic, mysterious, mystifying, baffling, deep, profound, secretive
ANTONYMS

comprehensible, penetrable

2‘a pool of dark, unfathomable water’

SYNONYMS
deep, immeasurable, fathomless, unfathomed, unplumbed, unplumbable, bottomless, unsounded, profound
ANTONYMS

shallow