counterproductive (adj.)
- baleful
- baneful
- barren
- bootless
- constrictive
- contrary
- corrosive
- corrupting
- corruptive
- crosswise
- damaging
- deadly
- deleterious
- detrimental
- disadvantageous
- distressing
- effete
- empty
- etiolated
- fatuous
- feckless
- fruitless
- futile
- harmful
- hindering
- hurtful
- inadequate
- inane
- ineffective
- ineffectual
- inefficacious
- injurious
- inoperative
- invalid
- lethal
- malefic
- malevolent
- malign
- malignant
- mischievous
- noisome
- noxious
- nugatory
- obstructive
- occlusive
- ominous
- pernicious
- poisonous
- prejudicial
- repressive
- restrictive
- sterile
- stifling
- suppressive
- toxic
- troublesome
- unavailing
- useless
- vain
- venomous
- vicious
- virulent
