卑
ヒ, いや.しい, いや.しむ, いや.しめる

lowly, base, vile, vulgar

JLPT1 G7 S9 F2003

The relevant seal inscription form shows a variant form of 左 (left hand) spread over the handle of an implement used to flatten or lower a surface, such as a spatula or a trowel → *low*; *lowly*; *base* (← bottom) → *vulgar*; *greedy*; *mean* → *humble*; *despise* (← make oneself/another lower).

[Full Kanji Etymology List]