unforced
adjective sports uk/ˌʌnˈfɔːst/ us/ˌʌnˈfɔːrst/
主动的（失误）
(of an error) caused by a mistake a player has made rather than as the result of their opponent's skilful play
非强迫的，自愿的
done as a result of your own decision, rather than being forced by someone else
an unforced agreement between individuals about what to do 个人之间对如何行动的自主协议
不费劲的，不勉强的，自然的
happening or done without any effort
natural, unforced laughter 自然且自发的笑声