少なくとも expresses a minimum threshold.
Forms
少ない (few, little) + く (adverb form) + とも (at least)
Similar words
- 少なくとも: at least (neutral, formal)
- せめて: at least (implies desire for more)
- 最低でも: at minimum
Usage
少なくとも is often used for quantities, time, or to express a minimum opinion. It's more objective than せめて, which has an emotional nuance of wishing for more.