AT THE LEAST (OR VERY LEAST)
Meaning of AT THE LEAST (OR VERY LEAST) in English
at the least ( or very least)
1》 not less than; at the minimum.
2》 taking the most pessimistic or unfavourable view.
→ least
Concise Oxford English vocab.
Сжатый оксфордский словарь английского языка.
2004