"sourer" in the adjective sense

1. sour, rancid

smelling of fermentation or staleness

2. sour

having a sharp biting taste

3. sour

one of the four basic taste sensations like the taste of vinegar or lemons

4. off, sour, turned

in an unpalatable state

"sour milk"

5. false, off-key, sour

inaccurate in pitch

"a false (or sour) note"

"her singing was off key"

6. dark, dour, glowering, glum, moody, morose, saturnine, sour, sullen

showing a brooding ill humor

"a dark scowl"

"the proverbially dour New England Puritan"

"a glum, hopeless shrug"

"he sat in moody silence"

"a morose and unsociable manner"

"a saturnine, almost misanthropic young genius"- Bruce Bliven

"a sour temper"

"a sullen crowd"

Source: WordNet® (An amazing lexical database of English)

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