different between deleterious vs unlucky

English

Etymology

From Medieval Latin deleterius, from Ancient Greek ?????????? (d?l?t?rios, “noxious, deleterious”), from ??????? (d?l?t?r, “a destroyer”), from ???????? (d?léomai, “I hurt, damage, spoil, waste”), 1640s.

Pronunciation

• (Received Pronunciation) IPA^(key): /?d?l??t???i.?s/, /?d?l??t???i.?s/
• (US) IPA^(key): /?d?l??t??i.?s/
• Rhymes: -??ri?s

Adjective

deleterious (comparative more deleterious, superlative most deleterious)

1. Harmful often in a subtle or unexpected way.

   Synonyms: destructive, harmful, hurtful, injurious, noxious, pernicious; see also Thesaurus:harmful
2. (genetics) having lower fitness.

Derived terms

• deleteriously
• deleteriousness

Related terms

• delete
• deletion
• deletory

Translations

Further reading

• deleterious at OneLook Dictionary Search
• deleterious in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• Douglas Harper (2001–2021) , “deleterious”, in Online Etymology Dictionary

References

English

Etymology

From un- +? lucky.

Pronunciation

• IPA^(key): /?n?l?ki/
• Rhymes: -?ki

Adjective

unlucky (comparative unluckier or more unlucky, superlative unluckiest or most unlucky)

1. Unfortunate, marked by misfortune.
2. Inauspicious.
3. Having ill luck.
4. Bringing ill luck.

Derived terms

• unluckily
• unluckiness
• unluckier
• unluckiest

Translations

References

• unlucky in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.