least

Lowest in importance or rank.

Smallest in magnitude or degree.

Slightest or tiniest.

To or in the lowest or smallest degree.

One that is the lowest or smallest in importance, rank, magnitude, or degree.

(at least) According to the lowest possible assessment; not less than.

(at least) Regardless of what has occurred or will occur; in any case.

(at least) Used to emphasize a somewhat positive aspect following a negative one.

(in the least) At all.