illegitimate
adj. 私生的;非法的;不合理的
vt. 认做私生子;认为违法
n. 非嫡出子;庶子
例句
They discovered he had an illegitimate child.
他们发现他有一个私生子。
《柯林斯英汉双解大词典》
He realized that, otherwise, the election would have been dismissed as illegitimate by the international community.
他意识到,不这样的话,选举就会被国际社会以不合法为由而不予承认。
Most of them are illegitimate.
这些孩子基本上都是私生子。