To fathom something is to understand it completely. You might say that someone has fathomed your intentions when you've communicated them clearly and completely.
It was hard to fathom how she could have done it, especially since she had never done it before.
It was hard to fathom the magnitude of the disaster, because it had never happened before.
verb
measure the depth of (a body of water) with a sounding line
Synonyms:
noun
a linear unit of measurement (equal to 6 feet) for water depth
Synonyms:
noun
(mining) a unit of volume (equal to 6 cubic feet) used in measuring bodies of ore
Synonyms:
verb
come to understand
Synonyms:
1
Nobody could fathom the depth of his sadness.
2
How could you possibly fathom the depth of my knowledge
3
There's no fathomable way of this material.
4
It's the rest of the argument that I couldn't fathom.
5
I realize the fathom of the situation now.
6
I can't fathom the details of the template.
7
They will be able to compete with every fathomable opponent.
8
Tthe time frame is certainly fathomable.
9
With the fathom there is a clear connection to the cable and chain.
10
It's more than the mind can possibly fathom.