ケイ, かたむ.く, かたむ.ける, かたぶ.く, かた.げる, かし.げる

lean, incline, tilt, trend, wane, sink, ruin, bias

JLPT2 G7 S13 F938

As per 頃#: incline one's head → *tilt*; *incline*; *lean*; *list* (to one side); *slant*; *sink*; *decline*; *concentrate* (on) (← incline one's head toward a desk) → *squander*; *ruin* (← decline). Here, has no semantic function, being used simply to create a derivative character conveying meanings that dropped from the original one.

[Full Kanji Etymology List]