expression, godan verb (-ru)
join forces; ally oneself; hold hands
Literally 'to hold hands', but idiomatically means to cooperate or form an alliance. The literal meaning is also used, but the idiomatic sense is more common in political or business contexts.
二つの会社が手を握って新製品を開発した。
The two companies joined forces to develop a new product.
They were walking holding hands.