出典:Wiktionary
出典:『Wiktionary』 (2026/03/23 04:24 UTC 版)
From un- (prefix meaning ‘not’) + fathom (“to measure the depth of (water); (figurative) to deeply understand (someone or something)”) + -able (suffix forming adjectives denoting things not able or fit to be done).
unfathomable (comparative more unfathomable, superlative most unfathomable)
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