Learn how to say Sourest correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word sour:
1having an acid taste like lemon or vinegar:
she sampled the wine and found it was sour
(of food, especially milk) having gone bad because of fermentation:
the kitchen smelled of sour milk
having a rancid smell:
her breath was always sour
2feeling or expressing resentment, disappointment, or anger:
he gave her a sour look
the meeting ended on a sour note
3(of soil) deficient in lime and usually dank.
4(of petroleum or natural gas) containing a relatively high proportion of sulphur.
a drink made by mixing a spirit with lemon or lime juice:
a rum sour