Undulate can be categorized as a verb and an adjective.
Adjective |
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| undulate - having a wavy margin and rippled surface | ||
Verb |
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| undulate - increase and decrease in volume or pitch, as if in waves; "The singer's voice undulated" | ||
| undulate - move in a wavy pattern or with a rising and falling motion; "The curtains undulated"; "the waves rolled towards the beach" | ||
| undulate - stir up (water) so as to form ripples | ||
| undulate - occur in soft rounded shapes; "The hills rolled past" |