adverb. 'There are beautiful quiet passages (including a surprisingly restrained Jaco solo) and tracks that just build and build until they just explode cathartically. '

Is catharsis an adjective?

The adjective cathartic entered English with a meaning descriptive of such a physically cleansing purge. It didn't take long for people to start using these words figuratively in reference to emotional release and spiritual cleansing.

Is Cathartically a word?

adj. Inducing catharsis; purgative.