What does "unplumbed" mean?

Not measured for depth, with or as if with a plumb.

Unplumbed

Common synonyms include: unfathomed, able, all comprehensive, all inclusive, all-comprehensive, all-inclusive.

adj

adj ·Uncommon ·Advanced level

Adjective

1
Not measured for depth, with or as if with a plumb.
"The unplumbed depths of the sea will remain a mystery to land-bound humans."
2
Not assayed or measured in any way. figuratively
"There he was suddenly checked, facing the unplumbed complexity of child or woman in her."

Adjective

1
situated at or extending to great depth; too deep to have been sounded or plumbed wordnet

"The unplumbed depths of the sea will remain a mystery to land-bound humans."

From un- + plumbed.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.