Hand
Arm
noun
The kanji means hand, and the word means hand too! It can also be used to refer to your whole arm.
て
Since this word is made up of a single kanji, it uses the kun'yomi reading. Since this is a body part, the kun'yomi reading usually takes priority. That means you learned the kun'yomi reading already when you learned the kanji.
手がカサカサになってしまいました。
My hands got really dry.
手をつないでもいい？
Can I hold your hand?
パパの手はモジャモジャだ。
Dad's arms are all shaggy.