- deleterious⇄adv. deleteriously.
- deleterious⇄deleterious, adjective.
causing harm; injurious.
Ex. 'Tis pity wine should be so deleterious (Byron). The deleterious genetic effects [of radiation] would persist for hundreds of generations (Bulletin of Atomic Scientists).
(SYN) harmfu - deleterious⇄noun deleteriousness.