c. 1300, from Anglo-French severer, Old French sevrer "to separate" (12c., later in French restricted to "to wean," i.e. "to separare from the mother"), from Vulgar Latin *seperare, from Latin separare "to pull apart," from se- "apart" (see secret (n.)) + parare "make ready, prepare" (from PIE root *pere- (1) "to produce, procure").
sever a relationship
His head was severed from his body
seventies
seventieth
seventy
seven-up
seven-year itch
sever
several
severally
severance
severe
severely