OXFORD DICTIONARY
Least, adj., n., & adv.
--adj.
1 smallest, slightest, most insignificant.
2 (prec. by the; esp. with neg.) any at all (it does not make the least difference).
3 (of a species or variety) very small (least tern).
--n. the least amount.
--adv. in the least degree.
at least
1 at all events; anyway; even if there is doubt about a more extended statement.
2 (also at the least) not less than. in the least (or the least) (usu. with neg.) in the smallest degree; at all (not in the least offended). least common denominator, multiple see DENOMINATOR, MULTIPLE. to say the least (or the least of it) used to imply the moderation of a statement (that is doubtful to say the least).
OE l{aelig}st, l{aelig}sest f. Gmc
THESAURUS
Least
at a disadvantage, at the nadir, below, below the mark, few, homely, humble, humble-looking, humble-visaged, humblest, in the gutter, inglorious, innocuous, least of all, less, littlest, low, lowest, lowliest, lowly, mean, minim, minimum, minority, minority group, modest, plain, poor, short of, shortest, simple, slightest, small, smallest, teachable, the few, the minority, under, under par, undistinguished, unimportant, unpretentious, we happy few
ROGET THESAURUS
Least
Inferiority
N
inferiority, minority, subordinacy, shortcoming, deficiency, minimum, smallness, imperfection, lower quality, lower worth, commonalty, inferior, smaller, small, minor, less, lesser, deficient, minus, lower, subordinate, secondary, secondrate, sub, subaltern, thrown into the shade, weighed in the balance and found wanting, not fit to hold a candle to, can't hold a candle to, least, smallest &c (little) (small), lowest, diminished, reduced, unimportant, less, under the mark, below the mark, below par, at the bottom of the scale, at a low ebb, at a disadvantage, short of, under.