4
detriment(noun, hurt, wrong, damage, evil)
4
disadvantageous(adjective, negative, contrary, harmful, unfavorable)
4
disturbed(adjective, hurt, low, sad, unhappy)
4
forbidding(adjective, arouse bad emotions)
4
foul(adjective, bad, evil, inexpedience)
4
fragile(adjective, weak, delicate, false, unstable)
4
ghastly
4
hard(adjective, mean, harsh, hostile, unfriendly)
4
harsh(adjective, mean, bad, evil, negative)
4
in poor health(expression, adjective, idiom, mean, weak)
4
infection(noun, disease, illness, bane, virus)
4
laid low(expression, adjective, weak, delicate, sick)
4
malignant(adjective, mean, rude, vicious, wicked)
4
menacing
4
naughty
4
off colour
4
outrage(noun, adjective, trouble, hurt, wrong)
4
pain(noun, health, trouble, wrong, damage)
4
pale(adjective, weak, thin, unhealthy, unwell)
4
pallid(adjective, weak, thin, sick, pale)
10 years ago|30k views|share |citing 
APASmart Define. (2016). ill thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/ill/thesaurus/synonyms
ChicagoSmart Define. 2016. "ill thesaurus" https://smartdefine.org/ill/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, ill thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/ill/thesaurus/synonyms>.
MLASmart Define. "ill thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/ill/thesaurus/synonyms>