Are yams and sweet potatoes the same?
c.1300, cesen, from Old French cesser "to come to an end, stop, cease; give up, desist," from Latin cessare "to cease, go slow, give over, leave off, be idle," frequentative of cedere (past participle cessus) "go away, withdraw, yield" (see cede). Related: Ceased; ceasing. Old English in this sense had geswican, blinnan.
"cessation, stopping," c.1300, from cease (n.) or else from Old French cesse "cease, cessation," from cesser.