seesaw

Từ điển American Heritage Dictionary 4th

see·saw (sēʹsô')n.
1. A long plank balanced on a central fulcrum so that with a person riding on each end, one end goes up as the other goes down.Also called regionally dandle, dandle board, teedle board, teeter, teeterboard, teeter-totter, tilt¹, tilting board. See Regional Note at teeter-totter.
2. The act or game of riding a seesaw.
3. A back-and-forth or up-and-down movement, as of the lead between two contesting parties.intr.v. see·sawed, see·saw·ing, see·saws
1. To play on a seesaw.
2. To move back and forth or up and down. [Reduplication of saw¹.]

• Từ đồng nghĩa / Synonyms:
  teeter, teeter-totter, teetertotter, teeterboard, tilting board, dandle board, totter