To extend a hand in help; to lend assistance to someone in need (physically or emotionally).
被災地の人々に多くのボランティアが手を差し伸べた。
Many volunteers reached out to help the people in the disaster area.
新入社員が困っていると、先輩がすぐに手を差し伸べてくれた。
When the new employee was struggling, a senior colleague immediately lent a hand.
社会は困っている人に手を差し伸べる仕組みを整えるべきだ。
Society should put systems in place to extend help to those in need.