关于“默契”的说法网上已经有人给出了in tune 和 connection的说法，但是拔丝英语法今天要用的是一个非常简单、地道的小词 click
To connect, relate, hit it off with someone.
When I first met her, we just clicked, and we're best friends now.
in the respective of having a very close relationship with friends, couples or family or more likely when a couple is known to have found something in common, a close relationship, love, sex, chemistry
they share a click with one another
we have met for the first time and i think we had a click!
i think this relationship click's, its clicking!