English
trolley
Early 19th century (1823) meaning "cart", of dialectal origin (Suffolk), probably from troll (“to trundle, roll”) + -ey (diminutive ending).
Formed from troll ‘to trundle, roll’ + -ey
Proto-Germanic *truzlą ‘supernatural being’
Old Norse trǫll ‘conjurer, mage’
Middle English trol ‘demon (?)’
English troll
Today it means
noun A trolley pole; a single-pole device for collecting electrical current from an overhead electrical line, normally for a tram/streetcar or a trolleybus.
Language periods are conventional ranges, not dates for this word.
Etymograph / trolley