profound, unfathomed, unplumbed, unsounded
(adjective) situated at or extending to great depth; too deep to have been sounded or plumbed; “the profound depths of the sea”; “the dark unfathomed caves of ocean”-Thomas Gray; “unplumbed depths of the sea”; “remote and unsounded caverns”
Source: WordNet® 3.1
unplumbed (comparative more unplumbed, superlative most unplumbed)
Not measured for depth, as if with a plumb.
The unplumbed depths of the sea will remain a mystery to land-bound humans.
Source: Wiktionary
Un*plumb", v. t. Etym: [1st pref. un- + plumb.]
Definition: To deprive of lead, as of a leaden coffin. [R.] Burke.
Source: Webster’s Unabridged Dictionary 1913 Edition
10 January 2025
(noun) the act of combining one thing at intervals among other things; “the interspersion of illustrations in the text”
The world’s most expensive coffee costs more than US$700 per kilogram. Asian palm civet – a cat-like creature in Indonesia, eats fruits, including select coffee cherries. It excretes partially digested seeds that produce a smooth, less acidic brew of coffee called kopi luwak.
