欺
ギ, あざむ.く
deceit, cheat, delude
JLPT1 G7 S12 F1541
As per
其
# (square/rectangular) +
欠
bent, open-mouthed figure → (square-)masked figure (compare
夏
) → *deceive*; *trick*; *cheat* (← masked, deceptive appearance).
[Full Kanji Etymology List]