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English definition of “fathom”

fathom

verb [T]     /ˈfæð.əm/
to discover the meaning of something: For years people have been trying to fathom (out) the mysteries of the whale's song.Understanding and comprehending to understand someone or why someone acts as they do: I can't fathom her at all.Understanding and comprehending
(Definition of fathom verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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