trespasser

noun

Etymology: Etymology tree English trespass English -er English trespasser From trespass + -er.

1. One who trespasses; an interloper.

   “Pilton Yard, the Lynton & Barnstaple headquarters, has been taken over by a fur trading firm, and would-be trespassers to the old engine-shed are turned back by the pungent odour of heaps of carcases.”

   “The human is a land animal, not an aquatic one, and he is therefore a trespasser in the water.”