"dunes" in the noun sense

1. dune, sand dune

a ridge of sand created by the wind found in deserts or near lakes and oceans

"dunes" in the verb sense

1. torment, rag, bedevil, crucify, dun, frustrate

treat cruelly

"The children tormented the stuttering teacher"

2. dun

persistently ask for overdue payment

"The grocer dunned his customers every day by telephone"

3. dun

cure by salting

"dun codfish"

4. dun

make a dun color

Source: WordNet® (An amazing lexical database of English)

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