deleterious
[adjective]
Synonyms: harmful, damaging, detrimental, hurtful, injurious, mischievous, nocent, nocuous, prejudicial, prejudicious

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Antonyms: salutary
Contrasted words: advantageous, profitable, healthful, healthy, salubrious, wholesome
Related Words: destroying, destructive, ruining, ruinous

[TahlilGaran] English Synonym Dictionary ▲

del‧e‧ter‧i‧ous /ˌdeləˈtɪəriəs◂, ˌdelɪˈtɪəriəs◂ $ -ˈtɪr-/ adjective formal
[Date: 1600-1700; Language: Medieval Latin; Origin: deleterius, from Greek deleisthai 'to hurt']
damaging or harmful Synonym : detrimental:
the deleterious effects of smoking

[TahlilGaran] Dictionary of Contemporary English ▲