Synonyms of the word

sullen

• adj. Having a brooding ill temper; sulky.
• adj. Gloomy; dismal; foreboding.
• adj. Sluggish; slow.
• adj. (obsolete) Lonely; solitary; desolate.
• adj. (obsolete) Mischievous; malignant; unpropitious.
• adj. (obsolete) Obstinate; intractable.
• n. (obsolete) One who is solitary, or lives alone; a hermit.
• n. Sullen feelings or manners; sulks; moroseness.

cloudy

• adj. Covered with or characterised by clouds; overcast.
• adj. Not transparent or clear.
• adj. Uncertain; unclear.

dark

• adj. Having an absolute or (more often) relative lack of light.
• adj. (of colour) Dull or deeper in hue; not bright or light.
• adj. Hidden, secret, obscure.
• adj. Without moral or spiritual light; sinister, malign.
• adj. Conducive to hopelessness; depressing or bleak.
• adj. Lacking progress in science or the arts; said of a time period.
• adj. With emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction…
• n. A complete or (more often) partial absence of light.
• n. (uncountable) Ignorance.
• n. (uncountable) Nightfall.
• n. A dark shade or dark passage in a painting, engraving, etc.

dour

• adj. Stern, harsh and forbidding.
• adj. Unyielding and obstinate.
• adj. Expressing gloom or melancholy; sullenly unhappy.

glowering

• v. present participle of glower.
• n. The act of giving a glower.

glum

• v. (obsolete) To look sullen; to be of a sour countenance; to be glum.
• n. (obsolete) sullenness.
• adj. despondent; moody; sullen.

heavy

• adj. (of a physical object) Having great weight.
• adj. (of a topic) Serious, somber.
• adj. Not easy to bear; burdensome; oppressive.
• adj. (Britain, slang, dated) Good.
• adj. (dated, late 1960s, 1970s, US) Profound.
• adj. (of a rate of flow) High, great.
• adj. (slang) Armed.
• adj. (music) Louder, more distorted.
• adj. (of weather) Hot and humid.
• adj. (of a person) Doing the specified activity more intensely than most other people.
• adj. (of food) High in fat or protein; difficult to digest.
• adj. Of great force, power, or intensity; deep or intense.
• adj. Laden to a great extent.
• adj. Laden with that which is weighty; encumbered; burdened; bowed down, either with an actual burden, or with…
• adj. Slow; sluggish; inactive; or lifeless, dull, inanimate, stupid.
• adj. Impeding motion; cloggy; clayey.
• adj. Not raised or leavened.
• adj. Having much body or strength; said of wines or spirits.
• adj. (obsolete) With child; pregnant.
• adv. heavily.
• adv. (India, colloquial) very.
• n. A villain or bad guy; the one responsible for evil or aggressive acts.
• n. (slang) A doorman, bouncer or bodyguard.
• n. (aviation) A large multi-engined aircraft.
• v. (often with "up") To make heavier.
• v. To sadden.
• v. (Australia, New Zealand, informal) To use power and/or wealth to exert influence on, e.g., governments…
• adj. Having the heaves.

ill-natured

• adj. Having a bad nature, whether.

lowering

• v. present participle of lower.
• adj. That lowers or frowns.
• n. The act of something being lowered.

moody

• adj. Given to sudden or frequent changes of mind; temperamental.
• adj. sulky or depressed.
• adj. dour, gloomy or brooding.
• adj. (slang) dodgy or stolen.

morose

• adj. Sullen, gloomy; showing a brooding ill humour.

saturnine

• adj. Of or born under Saturn's influence.
• adj. Containing lead, or suffering from lead poisoning (saturnia).
• adj. Having a tendency to be gloomy, bitter, and sarcastic; sullenly sardonic.
• adj. Gloomy, depressed, dull.
• adj. Cold and slow to change and react (refers to mood).

sour

• adj. Having an acidic, sharp or tangy taste.
• adj. Made rancid by fermentation, etc.
• adj. Tasting or smelling rancid.
• adj. Peevish or bad-tempered.
• adj. (of soil) Excessively acidic and thus infertile.
• adj. (of petroleum) Containing excess sulfur.
• adj. Unfortunate or unfavorable.
• adj. (music) Off-pitch, out of tune.
• n. The sensation of a sour taste.
• n. A drink made with whiskey, lemon or lime juice and sugar.
• n. (by extension) Any cocktail containing lemon or lime juice.
• n. A sour or acid substance; whatever produces a painful effect.
• v. (transitive) To make sour.
• v. (intransitive) To become sour.
• v. (transitive) To spoil or mar; to make disenchanted.
• v. (intransitive) To become disenchanted.
• v. (transitive) To make (soil) cold and unproductive.
• v. To macerate (lime) and render it fit for plaster or mortar.

threatening

• v. present participle of threaten.
• adj. Presenting a threat; menacing; frightening.
• n. An act of threatening; a threat.