빠뜨려요 · 빠뜨렸어요 · 빠뜨릴 거예요 · 빠뜨리세요
to drop (into); to leave out, omit; to lose (something)
Example
실수로 휴대폰을 화장실 물에 빠뜨렸어요.
I accidentally dropped my phone in the toilet.
Word parts
빠지다 'to fall in; to be missing' + -뜨리다, which makes it forceful.
Good to know
빠트리다 is also standard and means the same thing.