adjective Etymology: Greek dēlētērios, from dēleisthai to hurt Date: 1643 harmful often in a subtle or unexpected way , see: pernicious ~ly adverb ~ness noun
DELETERIOUS
Meaning of DELETERIOUS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012