Antonyms of adj bilious

2 of 3 senses of bilious

Sense 2
bilious, liverish, livery -- (suffering from or suggesting a liver disorder or gastric distress)

INDIRECT (VIA ill) -> well -- (in good health especially after having suffered illness or injury; "appears to be entirely well"; "the wound is nearly well"; "a well man"; "I think I'm well; at least I feel well")

Sense 3
atrabilious, bilious, dyspeptic, liverish -- (irritable as if suffering from indigestion)

INDIRECT (VIA ill-natured) -> good-natured -- (having an easygoing and cheerful disposition; "too good-natured to resent a little criticism"; "the good-natured policeman on our block"; "the sounds of good-natured play")

Similarity of adj bilious

3 senses of bilious

Sense 1
bilious, biliary -- (relating to or containing bile)

Sense 2
bilious, liverish, livery -- (suffering from or suggesting a liver disorder or gastric distress)
       => ill (vs. well), sick -- (affected by an impairment of normal physical or mental function; "ill from the monotony of his suffering")

Sense 3
atrabilious, bilious, dyspeptic, liverish -- (irritable as if suffering from indigestion)
       => ill-natured (vs. good-natured) -- (having an irritable and unpleasant disposition)