nubile

Nubile means young and old enough to marry, said of a woman. A nubile daughter, of nubile age, nubile young women.

The Latin means simply marriageable, and that was the whole sense until the twentieth century, when it drifted towards meaning sexually attractive — which is why the word now sounds leering and is largely avoided. It has never been used of men. Note nuptial, from the same root about marrying.