助け合って

help each other, assist one another

→ 助け合う
助け to help; to lend a hand + 合っ mutually; with each other + て Te-form (conjunctive form)
verb Rare #43,668
help each other, assist one another The て-form of 助け合う; it connects to what follows.
JA: 私たちは近所の人と助け合って暮らしています。
EN: We live by helping our neighbors.

私は彼と助け合ってその仕事をした。

I worked on the task with him, helping each other along the way.

あらゆる事情が助け合って彼を幸福にした。

Everything came together to make him happy.