understanding/ ^ndə'stændɪŋ /

1.adjective
通情达理的

2.noun [c/u] 
(knowledge) 了解

3.noun [u] 
(sympathy) 同情

4.noun [c] 
(agreement) 协定

5.noun [u] 
(trust) 相互理解

to come to an understanding with sb (about sth)
(就某事)和某人达成协议
to have an understanding of sth
对某事有一定的了解
on the understanding that...
在…条件下