埒
レツ, ラツ, ラチ, らち.があく, かこ.い

picket, limits, be settled

JLPT0 G13 S0 F5000

寽 is 爪 claw/hand + 寸 here an abbreviated form of 奪 snatch → pick/pluck then enclose an object in the fingertips or hand. 埒 is as per 寽# (enclose) + 土 earth → earthen *enclosure* or embankment. Also, *framework* and *restriction* (← delimit human behavior ← enclosure; compare 律, 法, 笵 and 憲).

[Full Kanji Etymology List]