unforced
/ˌʌnˈfɔːst/adjective
1- not produced by effort; natural不勉强的; 自然的：
an unforced cheerfulness.
由衷的欢欣。
1.1
- not compelled or constrained非强迫的; 自愿的：
his retirement was an unforced departure.
他退休是自愿卸任。
派生词