2004: Immeasurable and unplummetable fathoms / too deep for sounding or for any anchor — Derek Walcott, The Prodigal, (Farrar, Straus and Giroux, 2004) page 102.
Source: wiktionary
Unplummetable
Synonyms for "unplummetable"
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.