We use 'least' to show the smallest size, number, or degree of something. It compares things and shows the smallest part or amount.
This is the least expensive bag.
She had the least amount of money.
'Least' can describe something that has very little importance or value compared to others. It tells us which thing is the lowest in feeling or worth.
He showed the least interest in sports.
This idea has the least value for us.
As a noun, 'least' means the smallest part or smallest amount of something. It usually talks about the smallest problem or worry.
The least of the problems is noise.
She is the least of our worries now.
'Least' is used as an adverb with words like 'at' to say something is true in a small amount or degree. It often shows a minimum or small effort.
He was hurt at least a little.
At least try to finish your work.
When used in negative phrases, 'least' means 'not at all' or 'not the smallest amount.' It expresses no interest or no care.
I don't care the least about rumors.
She is worried least about money.
'Least' should not be confused with 'lease,' which is a noun or verb related to renting property. They sound similar but have different meanings and spellings.
'To say the least' is a phrase used after a statement. It means the real situation is even stronger or more serious than what was said.
The trip was difficult, to say the least.
She was unhappy, to say the least.