fathom
verb | /fathom/
understand (a difficult problem or an enigmatic person) after much thought
fathom
verb | /fathom/
Advanced WordsMEDIUMunderstand (a difficult problem or an enigmatic person) after much thought
Learning Progress
Synonyms
Antonyms
Examples
"I cannot fathom why she left without saying goodbye."
"They tried to fathom the reasoning behind the decision."
Mnemonic Trick
FATHOM → FAITH + HOME: reach depth of understanding — fathom = measure depth (of idea).
Etymology
Old English fæthm “outstretched arms” used for measuring depth; later figurative.
Now commonly used for understanding or measuring depth.
Continue Learning
Community Stats
Track Your Progress
Sign up to save your favorite words and track your learning progress across all vocabulary types.
Take your English vocabulary to the next level
Vocabulary Builder is a smart and comprehensive English vocabulary app designed to help you learn, remember, and master words effectively. Whether you are preparing for competitive exams or improving everyday English, the app goes beyond simple definitions to ensure deep understanding and long-term retention.

