衡
コウ, ひら

equilibrium, measuring rod, scale

JLPT1 G7 S16 F1847

As per 行# (straight and crossing) + an element combining 大 stand outstretched and an abbreviated form of 角 horn → straight, crossing bars used to hold down the horns of cattle → *scale*; *measure*; *weigh* (← bars used in making measurements ← wooden bars).

[Full Kanji Etymology List]