手首(てくび)wrist

不審(ふしん)者(しゃ)に手首(てくび)を掴(つか)まれた。

I was grabbed by the wrist by a suspicious person.

手首(てくび)は手(て)のひらと腕(うで)の間(あいだ)にある。

The wrist is located between the palm of the hand and the arm.

腕(うで)と手(て)のひらをつなげる部分(ぶぶん)は手首(てくび)です。

The part that connects the arm and the palm is the wrist.

どうやら手首(てくび)にブレスレットを巻(ま)いているのが私(わたし)の娘(むすめ)だ。

It seems that the one with a bracelet wrapped around her wrist is my daughter.

手首(てくび)のスナップを効(き)かせるとボールが柔(やわ)らかく飛(と)ぶのだとか。

Apparently, snapping your wrist will make the ball fly more smoothly.