Synonyms for least

modified

1. Smallest

   tiniest, minutest, infinitesimal, molecular, microcosmic, microscopic, atomic; see also minute 1.

2. Least important

   slightest, most trivial, niggling, piddling, finical, next to nothing; see also trivial, unimportant.

3. In the lowest degree

   minimal, at the nadir, most inferior, bottom; see lowest, minimum.

   Antonyms maximum*, highest, at the zenith.

at (the) least

not in the least