Meaning

noun a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground

noun a purified and potent form of cocaine that is smoked rather than snorted; highly addictive

originFrom earlier English ternado, attested since the 1550s as a nautical term for a windy thunderstorm. From Spanish tronada (“thunderstorm”), from tronar (“to thunder”), from Latin tonō (“to thunder”), from Proto-Indo-European *(s)tenh₂- (“to thunder”). The o and r were reversed in English (metathesis) under influence of Spanish tornar (“to twist, to turn”), from Latin tornō (“to turn”).

Etymology from Wiktionary, CC BY-SA 3.0