This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 剕 is uncertain. It combines 非 with 刂 (knife), but the original meaning and component relationship are unclear.
With no clear meaning, focus on the shape: 非 (not, wrong) beside 刂 (knife). Imagine a knife cutting away what is wrong, though the actual meaning is uncertain.
For ヒ, imagine a knife (刂) cutting through a wrong (非) answer marked with a big red 'H' (ヒ): the 'H' sound cues ヒ.
cutting off a foot (one of the five punishments of ancient China)