Wrist
noun
Your hand's neck is your wrist!
てくび
This word uses the kun'yomi readings from both kanji, probably because it includes body parts. You know them both already, so now you know this too!
ころんで手首をひねった。
I fell and twisted my wrist.
あぶらが手首にはねてヤケドしてしまった。
Hot oil splashed on my wrist and I got burned.
双子の妹には、手首にホクロがあるんだ。
My twin sister has a mole on her wrist.