virility (n.)

"period of manhood," 1580s, from Middle French virilité, from Latin virilitatem (nominative virilitas) "manhood," from virilis "of a man, manly, worthy of a man," from vir "a man, a hero," from PIE root *wi-ro- "man." Meaning "power of procreation, capacity for sexua intercourse" is from 1590s; sense of "manly strength" is recorded from c. 1600.