*bheuə-, also *bheu-, Proto-Indo-European root meaning "to be, exist, grow."

It forms all or part of: Bauhaus; be; beam; Boer; bondage; boodle; boom (n.1) "long pole;" boor; booth; bound (adj.2) "ready to go;" bower; bowery; build; bumpkin; busk; bustle (v.) "be active;" byre; bylaw; Eisteddfod; Euphues; fiat; forebear; future; husband; imp; Monophysite; neighbor; neophyte; phyletic; phylo-; phylum; phylogeny; physic; physico-; physics; physio-; physique; -phyte; phyto-; symphysis.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit bhavah "becoming," bhavati "becomes, happens," bhumih "earth, world;" Greek phyein "to bring forth, make grow," phytos, phyton "a plant," physis "growth, nature," phylon "tribe, class, race," phyle "tribe, clan;" Old English beon "be, exist, come to be, become, happen;" Old Church Slavonic byti "be," Greek phu- "become," Old Irish bi'u "I am," Lithuanian būti "to be," Russian byt' "to be."

"goods sold on agreement for future delivery," 1880, from future (n.) in a financial sense "speculative purchase or sale of stock or other commodities for future delivery."

by 1856 in theology, with reference to prophecy; 1915 as "avant garde, ultra-modern," from futurist (see futurism) + -ic. Meaning "pertaining to the future, predicted to be in the future" is from 1921, from future (n.) + -istic.

1946 (A. Huxley), from future (n.) + -ology.

1909 as the name of a movement in arts and literature, from Italian futurismo, coined 1909 by Italian poet Filippo Tommaso Marinetti (1876-1944); see future + -ism. Futurist is from 1911 in the arts movement sense; attested from 1842 in a Protestant theological sense ("one who holds that nearly the whole of the Book of Revelations refers principally to events yet to come" - Century Dictionary). As "one who has (positive) feelings about the future" it is attested from 1846 but marked in dictionaries as "rare."

c. 1600, from future + -ity.