irruption
🇺🇸
/ɪˈrʌpʃn/
🇬🇧
/ɪˈrʌpʃn/
A sudden, forceful entrance or appearance of something.
The sudden irruption of the birds into the garden surprised everyone.
鳥たちが突然庭に押し入り、皆を驚かせた。