otherwise
She had a glow that warmed the otherwise murky atmosphere his father created.

Is 'otherwise' an adjective here meaning opposite, used to modify a noun ?

Question

otherwise
She had a glow that warmed the otherwise murky atmosphere his father created.

Is 'otherwise' an adjective here meaning opposite, used to modify a noun ?

Answer

No. “Otherwise” is an adverb, modifying “murky”. The meaning is that the atmosphere would be murky if it were not for the warm glow that “she” had.

Answer

Yea, except it's not an adjective. It's an adverb.