ギリシャ語のdeleter, spoiler, destroyerから。おそらくPIE*da, to cut, to divideからさらに派生したもので、語源的にはdemonと同じである。
英語の語源
deleterious (adj.)
1640s, from Medieval Latin deleterius, from Greek deleterios "noxious," from deleter "destroyer," from deleisthai "to hurt, injure." Related: Deleteriously; deleteriousness.
例文
1. The cold weather had most deleterious consequences among the chrysanthems.
寒い天気は菊に極めて有害な影響を与えた。
2.Petty crime is having a deleterious effect on community life.
軽微な犯罪がコミュニティ生活に有害な影響を及ぼしている。
3.Exactly why the foreign body is so deleterious is not clear.
異物がなぜそれほど有害なのか、その正確な原因は不明である。
4.In normal seedlings the deleterious recessive genes are not expressed.
有害な劣性遺伝子は正常菌木には現れない.
5.The oxides of nitrogen can have deleterious effects on materials,vegetation,and animal and human life.