SICKENING
nauseating, nauseous, noisome, queasy, loathsome, offensive, sickening, vile
(adjective) causing or able to cause nausea; “a nauseating smell”; “nauseous offal”; “a sickening stench”
Source: WordNet® 3.1
Verb
sickening
present participle of sicken
Adjective
sickening (comparative more sickening, superlative most sickening)
Causing sickness or disgust.
(LGBT slang) Amazing, fantastic.
Noun
sickening (plural sickenings)
The act of making somebody sick.
Source: Wiktionary
Sick"en*ing, a.
Definition: Causing sickness; specif., causing surfeit or disgust;
nauseating.
– Sick"en*ing*ly, adv.
SICKEN
Sick"en, v. t. [imp. & p. p. Sickened; p. pr. & vb. n. Sickening.]
1. To make sick; to disease.
Raise this strength, and sicken that to death. Prior.
2. To make qualmish; to nauseate; to disgust; as, to sicken the
stomach.
3. To impair; to weaken. [Obs.] Shak.
Sick"en, v. i.
1. To become sick; to fall into disease.
The judges that sat upon the jail, and those that attended, sickened
upon it and died. Bacon.
2. To be filled to disgust; to be disgusted or nauseated; to be
filled with abhorrence or aversion; to be surfeited or satiated.
Mine eyes did sicken at the sight. Shak.
3. To become disgusting or tedious.
The toiling pleasure sickens into pain. Goldsmith.
4. To become weak; to decay; to languish.
All pleasures sicken, and all glories sink. Pope.
Source: Webster’s Unabridged Dictionary 1913 Edition