sour
🇺🇸
/ˈsaʊər/
🇬🇧
/ˈsaʊə(r)/
tasting sharp like lemon or unripe fruit
The sour lemon made my mouth pucker.
tasting or smelling bad because not fresh
The sour milk had a bad smell.
unfriendly or unpleasant
His sour mood made everyone uncomfortable.
to become or make less pleasant or friendly
The argument soured their friendship.
to become or make sour in taste
The warm weather made the milk sour quickly.