broad-minded
adjective approving uk/ˌbrɔːdˈmaɪn.dɪd/ us/ˌbrɑːdˈmaɪn.dɪd/
C2 心胸宽广的;（尤指对性行为）开明的
willing to accept other people's behaviour and beliefs, especially sexual behaviour
At 70 she was surprisingly broad-minded. 真想不到，她70岁了倒是很开明。
Compare: narrow-minded