"indicating something in the future by signs or symptoms," mid-15c., pronostik, c. 1600, from Medieval Latin pronosticus, prognosticus, from Greek prognōstikos "foreknowing," from progignōskein "come to know beforehand" (see prognosis). The -g- in the English word was restored 16c. Related: Prognostical (early 15c., pronostical).
1660s, "disposed to live in flocks" (of animals), from Latin gregarius "pertaining to a flock; of the herd, of the common sort, common," from grex (genitive gregis) "flock, herd," from PIE *gre-g-, reduplicated form of root *ger- "to gather." Of persons, "sociable," first recorded 1789. Related: Gregariously; gregariousness.
"to snack, to eat between meals," 1957, from Yiddish nashn "nibble," from Middle High German naschen, from Old High German hnascon, nascon "to nibble," from Proto-Germanic *(g)naskon. Related: Noshed; noshing. Earlier as a noun (1917) meaning "a restaurant," short for nosh-house.