WordofTheDay.US

onrush

/ˈɒnˌɹʌʃ/ noun

In Latin: ēruptiō Wiktionary

Origin

From on- + rush. Compare Middle English onresen (“to rush upon; attack”), from Old English onrǣsan (“to rush, rush on”); Old English onrǣs (“an onrush, assault, attack”).

From Wiktionary, via Kaikki.org (CC BY-SA)