Definitions

1. adjective

Extending or seeming to extend infinitely in depth or degree; immeasurable; bottomless.

“The fathomless depths of the ocean are a mystery to scientists.”

2. noun

Something that is fathomless.

“The fathomless despair that gripped the town after the disaster was palpable.”

3. adverb

To a degree that is beyond measurement or comprehension.

“The problems he faced in life were fathomless and seemed insurmountable.”