か 欠くべからざる LinksSentence search for 欠くべからざるSentence search for かくべからざるKanji details for 欠Edit in JMdict Expressions (phrases, clauses, etc.), Pre-noun adjectival (rentaishi)1. indispensable; essential; necessarySee also 欠くことのできない, See also 欠くことができない Discussions Log in to talk about this word.