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The Clue

Billow (8 letter answer)

The Answer

UNDULATE

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Notes

The answer UNDULATE is so rare that it appears less than once every 2500 puzzles.

Related Clues

Ripple
Make waves

Definition

UNDULATE as a verb:

1. (ripple, ruffle, riffle, cockle, undulate) = stir up (water) so as to form ripples
2. (roll, undulate) = occur in soft rounded shapes; "The hills rolled past"
3. (roll, undulate, flap, wave) = move in a wavy pattern or with a rising and falling motion; "The curtains undulated"; "the waves rolled towards the beach"
4. increase and decrease in volume or pitch, as if in waves; "The singer's voice undulated"

UNDULATE as an adjective:

1. having a wavy margin and rippled surface