DictionaryRoot: trollen
Middle English
trollen
wander; roll
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noun / verb
troll
TROHL/trəʊl/
Deliberate online provocation or a person who engages in it.
Etymology
The older verb for rolling developed a fishing sense, moving a baited line through water. The online label seems to combine this image of enticing a response with the folklore troll, a troublesome supernatural being.