sour

Tasting of acidity.

Lemons have a sour taste.

All sour things, as vinegar, provoke appetite.

Made rancid by fermentation, etc.

Don't drink that milk; it's turned sour.

Tasting or smelling rancid.

His sour breath makes it unpleasing to talk to him.

Hostile or unfriendly.

He gave me a sour look.

He was a scholar […] / Lofty and sour to them that loved him not, / But to those men that sought him sweet as summer.

Excessively acidic and thus infertile. (of soil)

sour land

a sour marsh

The sensation of a sour taste.

A drink made with whiskey, lemon or lime juice and sugar.

Any cocktail containing lemon or lime juice.

A sweet/candy having a sharply sour taste.

“You know I like them candies, especially the lemon sours.”

A sour or acid substance; whatever produces a painful effect.

For many Years of Sorrow can dispense; A Dram of Sweet is worth a Pound of Sour

To make sour.

Too much lemon juice will sour the recipe.

To become sour.

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

To spoil or mar; to make disenchanted.

To sour your happiness I must report, / The queen is dead.

He was prudent and industrious, and so good a husbandman, that he might have led a very easy and comfortable life, had not an arrant vixen of a wife soured his domestic quiet.

To become disenchanted.

We broke up after our relationship soured.

To make (soil) cold and unproductive.

stagnant water , which tends to sour the soil