Seesaw

Part of speech: noun (n.)

1. A play among children in which they are seated upon the opposite ends of a plank which is balanced in the middle, and move alternately up and down.

2. A plank or board adjusted for this play.

3. A vibratory or reciprocating motion. He has been arguing in a circle; there is thus a seesaw between the hypothesis and fact. Sir W. Hamilton.

4. Same as Crossruff.

Part of speech: verb (v.)

To move with a reciprocating motion; to move backward and forward, or upward and downward.

Part of speech: verb (v.)

To cause to move backward and forward in seesaw fashion. He seesaws himself to and fro. Ld. Lytton.

Part of speech: adjective (a.)

Moving up and down, or to and fro; having a reciprocating motion.