| undulate | | |
| v. (motion) | 1. cockle, riffle, ripple, ruffle, undulate | stir up (water) so as to form ripples. |
| ~ fold, fold up, turn up | bend or lay so that one part covers the other.; "fold up the newspaper"; "turn up your collar" |
| ~ flow, flux | move or progress freely as if in a stream.; "The crowd flowed out of the stadium" |
| v. (stative) | 2. roll, undulate | occur in soft rounded shapes.; "The hills rolled past" |
| v. (motion) | 3. flap, roll, undulate, wave | move in a wavy pattern or with a rising and falling motion.; "The curtains undulated"; "the waves rolled towards the beach" |
| ~ move | move so as to change position, perform a nontranslational motion.; "He moved his hand slightly to the right" |
| ~ luff | flap when the wind is blowing equally on both sides.; "the sails luffed" |
| v. (change) | 4. undulate | increase and decrease in volume or pitch, as if in waves.; "The singer's voice undulated" |
| ~ change | undergo a change; become different in essence; losing one's or its original nature.; "She changed completely as she grew older"; "The weather changed last night" |
| adj. | 5. undulate | having a wavy margin and rippled surface. |
| ~ smooth | of the margin of a leaf shape; not broken up into teeth. |
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