This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
誳 combines 言 (speech) with 屈 (bend, yield). The exact historical development is uncertain, but it likely relates to speech that is bent or constrained.
Words (言) that bend or yield (屈) suggest speech that is twisted or forced, but the exact meaning is uncertain.
For クツ, imagine a person bending their words so much they sound like they're wearing heavy boots: boots -> クツ, and the speech is as bent as a worn-out sole.