DictionaryfathomUnderstanding
verb

fathom

FATH-um/ˈfæðəm/

To understand something difficult or mysterious.

The older man finally fathoms how the puzzle's interlocking pieces fit together.

A two-moment sequence shows the same older man thoughtfully examining a wooden interlocking puzzle, then recognizing how its pieces fit together.
Etymology

The verb originally meant “to embrace or surround” and later meant taking soundings to measure depth. Understanding something became figuratively getting to its bottom with the mind.

In context

Storytime Haven196:05
she had now sought me--to beseech me to relinquish my efforts to fathom the mystery of the death of Edward Craig.
The Place of Dragons: A Mystery 🐉🔍 | A Thrilling Suspenseful Adventure by William Le Queux

More examples

  • She struggles to fathom the scale of the universe.
  • We finally fathomed what the poet meant.
  • His reasons for quitting are hard to fathom.

Forms

fathom · fathoms · fathomed · fathoming

fathomable adjective — Capable of being understood or explained.

unfathomable adjective — Impossible to understand or explain fully.

Similar words

understand
Broader; does not imply that something is difficult or mysterious.
grasp
Emphasizes achieving a clear understanding, sometimes quite suddenly.
comprehend
Often emphasizes understanding the full meaning or complexity.