1. (n.) A peculiar gland like but ductless organ found near the stomach or intestine of most vertebrates and connected with the vascular system; the milt. Its exact function in not known.

2. (n.) Anger; latent spite; ill humor; malice; as, to vent one's spleen.

3. (n.) A fit of anger; choler.

4. (n.) A sudden motion or action; a fit; a freak; a whim.

5. (n.) Melancholy; hypochondriacal affections.

6. (n.) A fit of immoderate laughter or merriment.

7. (v. t.) To dislike.

abdomen acerbity acid acidity acidulousness acrimony anger angst anguish animosity anus anxiety appendix asperity bad humor bad temper bile biliousness bitter resentment bitterness bitterness of spirit blind gut boredness boredom bowels brain causticity cecum cheerlessness choler colon corrosiveness despite despitefulness discomfort discomposure discontent dislike dispiritedness displeasure disquiet dissatisfaction dread dullness duodenum emptiness endocardium ennui entrails existential woe fed-upness flatness foregut gall giblets gizzard gnashing of teeth grimness grudge guts hard feelings heart heartburning hindgut ill ill humor ill nature ill temper innards inner mechanism inquietude insides internals intestine inwards jadedness jejunum joylessness kidney kishkes lack of pleasure large intestine life-weariness liver liver and lights lung malaise melancholy midgut nausea nongratification nonsatisfaction painfulness perineum pump pylorus rancor rankling rectum satiation satiety savorlessness slow burn small intestine soreness sourness staleness stomach taedium vitae tastelessness tediousness tedium ticker tiredness tripes uncomfortableness unease uneasiness unhappiness unpleasure unsatisfaction vermiform appendix vexation of spirit virulence viscera vitals wearifulness weariness works world-weariness wrath