English
Etymology
From un- + plummet + -able.
Adjective
unplummetable (not comparable)
- unable to be fathomed
- 2004: Immeasurable and unplummetable fathoms / too deep for sounding or for any anchor — Derek Walcott, The Prodigal, (Farrar, Straus and Giroux, 2004) page 102.