fathom (fathoms plural & 3rd person present) (fathoming present participle) (fathomed past tense & past participle )
1 n-count A fathom is a measurement of 1.8 metres or 6 feet, used when referring to the depth of water.
We sailed into the bay and dropped anchor in five fathoms of water.
2 verb If you cannot fathom something, you are unable to understand it, although you think carefully about it.
I really couldn't fathom what Steiner was talking about... V wh