fathom
/ˈfæðəm/verb
To understand something difficult or puzzling after thinking about it.
Example sentences
- “I can't fathom why anyone would pay that much for a sandwich.”
- “Investigators are still trying to fathom what caused the crash.”
- “She couldn't fathom how he had finished the exam so quickly.”
Usually negative, with 'can't' or 'couldn't'. As a noun, a fathom is a unit of water depth equal to six feet.