librate

• POS: Verb (intransitive)
• HYPHEN: li=brate

CIDE DICTIONARY

librate, v. i. [L. libratus, p. p. of librare to balance, to make even, fr. libra. Cf. Level, Deliberate, Equilibrium.].

 To vibrate as a balance does before resting in equilibrium; hence, to be poised.  [1913 Webster]
"Their parts all librate on too nice a beam."  [1913 Webster]

librate, v. t. 

 To poise; to balance.  [1913 Webster]

ROGET THESAURUS

librate

Oscillation

VB oscillate, vibrate, librate, alternate, undulate, wave, rock, swing, pulsate, beat, wag, waggle, nod, bob, courtesy, curtsy, tick, play, wamble, wabble, dangle, swag, fluctuate, dance, curvet, reel, quake, quiver, quaver, shake, flicker, wriggle, roll, toss, pitch, flounder, stagger, totter, move up and down, bob up and down, pass and repass, ebb and flow, come and go, vacillate, teeter, brandish, shake, flourish.