Verb (type 1): To swing, to rock, to sway, to seesaw, to pitch.
A related verb is keinuttaa, the causative aspect of keinua. Causative aspect verbs cause someone or something else to do or be something, or causes a change in state. Keinuttaa means ”to rock (as in ”to move gently back and forth”). Keinuttaa would be used when talking about someone rocking a baby in a cradle.