v. probe, sound, plumb, penetrate, search (out), investigate, measure, gauge, determine, ascertain, work out, get to the bottom of, delve into, understand, grasp, divine I never quite fathomed the purpose of this device
FATHOM
Meaning of FATHOM in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012