A few types of molecules get sensed by receptors on the tongue. Protons coming off of acids ping receptors for "sour." Sugars get received as "sweet." Bitter, salty, and the proteinaceous flavor umami all set off their own neural cascades.

His sour breath makes it unpleasing to talk to him.

The result may not quite give the Wearsiders a sweet ending to what has been a sour week, following allegations of sexual assault and drug possession against defender Titus Bramble, but it does at least demonstrate that their spirit remains strong in the face of adversity.

Unlike what the name implies, there is nothing inherently wrong with a sour note: It is perfectly well-tuned note that would sound normal in another context (and which presumably would not sound sour to someone unfamiliar with tonal music).

Too much lemon juice will sour the recipe.

So the sun's heat, with different powers, / Ripens the grape, the liquor sours.

We broke up after our relationship soured.

stagnant water , which tends to sour the soil

Sour

Meaning

Adj

Noun

Verb

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