unforced

剑桥词典

(of an error ) caused by a mistake a player has made rather than as the result of their opponent's skilful play
主动的（失误）

done as a result of your own decision , rather than being forced by someone else
非强迫的，自愿的
an unforced agreement between individuals about what to do 个人之间对如何行动的自主协议

happening or done without any effort
不费劲的，不勉强的，自然的
natural , unforced laughter 自然且自发的笑声 返回 unforced