Modicum

A small quantity of a particular thing, especially something considered desirable or valuable.

From Middle English modicum, from Latin modicum (“a little, a small amount”), a noun use of the neuter form of modicus (“moderate; restrained, temperate; reasonable”) + -cum (suffix forming neuter nouns). Modicus is derived from modus (“a measure; a bound, limit”) (ultimately from Proto-Indo-European *med- (“to measure”)) + -icus (suffix meaning ‘of or pertaining to’ forming adjectives).

iota, jot, tittle