seesaw Look up seesaw at Dictionary.com
also see-saw, 1630s, in see-saw-sacke a downe, words in a rhythmic jingle used by children and repetitive motion workers, probably imitative of the rhythmic back-and-forth motion of sawyers working a two-man saw over wood or stone (see saw). Reference to a game of going up and down on a balanced plank is recorded from 1704; figurative sense is from 1714. Applied from 1824 to the plank arranged for the game. The verb is from 1712.