drought n.

Middle English drie "without moisture, comparatively free from water or fluid," from Old English dryge, from Proto-Germanic *draugiz (source also of Middle Low German dröge, Middle Dutch druge, Dutch droog, Old High German trucchon, German trocken, Old Norse draugr), from Germanic root *dreug- "dry."

Meaning "barren" is mid-14c. Of persons, "showing no emotion," c. 1200; of humor or jests, "without show of pleasantry, caustic, sarcastic" early 15c. (implied in dryly). Sense of "uninteresting, tedious" is from 1620s. Of wines, brandy, etc., "free from sweetness or fruity flavor," 1700. Of places prohibiting alcoholic drink, 1870 (dry feast, one at which no liquor is served, is from late 15c.); colloquial dry (n.) "prohibitionist" is by 1888, American English political slang.

Dry goods (1650s) were those dispensed in dry, not liquid, measure. Dry land (that not under the sea) is from early 13c. Dry-nurse "nurse who attends and feeds a child but does not suckle it" is from 1590s. Dry run "rehearsal" is by 1941. Dry ice "solid carbon dioxide" is by 1925.

suffix forming nouns of action, state, or quality from verbs or adjectives (such as depth, strength, truth), from Old English -ðu, -ð, from Proto-Germanic *-itho (cognates: Old Norse -þ, Old High German -ida, Gothic -iþa), abstract noun suffix, from PIE *-ita (cognates: Sanskrit -tati-; Greek -tet-; Latin -tati-, as in libertatem "liberty" from liber "free"). Sometimes in English reduced to -t, especially after -h- (as in height).

Middle English dreinen, from Old English dreahnian "to draw off gradually, as a liquid; remove by degrees; strain out," from Proto-Germanic *dreug-, source of drought, dry, giving the English word originally a sense of "to make dry." Figurative meaning of "exhaust" is attested from 1650s. Intransitive sense of "to flow off gradually" is from 1580s. Related: Drained; draining.