IPA: /ˈɒn.rʌʃ/
KK: /ˈɑnˌrʌʃ/
A sudden and strong movement or flow of something, often in a forward direction.
The onrush of the crowd made it difficult to move through the narrow street.
Onrush → It is formed from "on-" (meaning upon or in the direction of) and "rush" (from Old English "ryscan", meaning to move quickly). The word "onrush" describes a rapid movement or surge in a particular direction.
Think of something moving quickly 'upon' you — 'on-' means in the direction of, and 'rush' means to move fast.