手を挙げる， 手を上げる， 手をあげる， てをあげる
1. to raise one's hand
2. to surrender
3. to raise one's hand to someone (as a threat to strike)
4. to become better (at something), to improve
5. to throw one's hat in the ring, to volunteer, to indicate one intends to participate, to raise one's ha...
tbd