Explosion

google

ref

early 17th century: from Latin explosio(n- ) ‘scornful rejection’, from the verb explodere (see explode).

wiktionary

ref

From French explosion, from Latin explōsiōnis, genitive form of explōsio, from explōdo(“I drive out by clapping”), from ex- and plōdo(“I clap or strike”). For more information see explode#Etymology.

etymonline

ref

explosion (n.)

1620s, "action of driving out with violence and noise," from French explosion, from Latin explosionem (nominative explosio) "a driving off by clapping," noun of action from past participle stem of explodere "drive out by clapping" (see explode for origin and sense evolution). Meaning "a going off with violence and noise" is from 1660s. Sense of "a rapid increase or development" is first attested 1953.