undulate

/ˈən-jə-lət/

Latin undulatus, from *undula, diminutive of unda wave

adjective

  1. having a wavy surface, edge, or markings

the undulate margin of a leaf

verb

  1. to form or move in waves : fluctuate

  2. to rise and fall in volume, pitch, or cadence

  3. to present a wavy appearance

swing sway oscillate vibrate fluctuate waver undulate mean to move from one direction to its opposite. swing implies a movement of something attached at one end or one side. sway implies a slow swinging or teetering movement.