この部屋では決して騒いではいけません。

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

room; apartment; flat; pad; chamber; stable

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

never; by no means; not in the least; in no way

to make noise; to make racket; to be noisy; to rustle; to swoosh; to make merry; to clamor; to clamour; to make a fuss; to kick up a fuss; to lose one's cool; to panic; to act flustered; to feel tense; to be uneasy; to be excited

if ... then; when; and; why don't you...?; the more (one does something); because; since