Fathom

Also used as a unit of measurement, typically for the depth of the sea, Fathom relates to having a good understanding or comprehension of something. As such, it simultaneously implies a level of curiosity and a desire to examine and make sense of things and and an element of depth and sincerity. Predominantly used as a surname, it has the weighty, wordy feel of names such as Favor, Prosper, Pius, Merit, Wisdom, Sincere, and Justice.

Pronounced FATH-um.