1an adverb used with a negative predicate to mean 'not at all' or 'not even a little' — strengthens the negation; rarely used in affirmative sentences
彼は少しも疲れていないと言ったが、顔色は悪かった。
He said he wasn't tired at all, but he looked pale.
宿題は少しも終わっていない。
I haven't finished any of the homework at all.
彼女はそのニュースを聞いても少しも驚かなかった。
Even after hearing the news, she wasn't surprised in the least.
この味は昔と少しも変わっていない。
This flavor hasn't changed a bit since back then.