茎 is built from the 艹 (grass (top)) and 巠 (warp thread (in 経·軽)) components.
It belongs to a phonetic family with 経, 軽, and 径 — they share the 巠 component and the reading ケイ.
A common word using 茎 is 茎 (くき), meaning “stalk”.
Don't confuse it with 径, 経, and 軽.
