Is it ensure, insure, or assure?
1701, of persons, "thoroughly accomplished," from thorough + past tense of breed. In the horse sense of "of pure breed or stock" it dates from 1796; the noun is first recorded 1842.
My penis •Accompanied by a gesture toward the indicated part: Hey Vanessa, how about the bailiffs seize this?/ ''Mom said to go walk the dogs'' ''Walk this, John! You walk the dogs!'' (1940s+)