noisome

adjective

1. offensive or disgusting, as an odor.
2. harmful or injurious to health; noxious.

adjective

1. (esp of smells) offensive
2. harmful or noxious

adj.late 14c., “harmful, noxious,” from noye “harm, misfortune,” shortened form of anoi “annoyance” (from Old French anoier, see annoy) + -some (1). Meaning “bad-smelling” first recorded 1570s. Related: Noisomeness.