(transitive, archaic, literary) To make (something) sickly. / (intransitive, rare) To become sickly.

In a sick manner; in a way that reflects or causes sickness.

Disgusted or revolted.

simple past tense and past participle of sicken

(slang, UK, Australia, New Zealand) To take a day off from work for ill health (either real or feigned).

plural of sickie / plural of sicky

A labor action where employees refuse to work claiming they are sick.

(sometimes figuratively) In a manner to sicken.

Too sweet; sickeningly sweet.

Alternative spelling of sickly sweet