Bedeutung von “keep sth down” — Learner’s Dictionary

keep sth down

phrasal verb with keep us uk /kiːp/ verb past tense and past participle kept
NO INCREASE

B2 to stop the number, level, or size of something from increasing:

I have to exercise to keep my weight down.
NOT VOMIT

to be able to eat or drink without vomiting:

I had food poisoning and couldn't keep anything down.

(Definition von “keep sth down” aus dem Cambridge Learner's Dictionary © Cambridge University Press)