"ruminative" in the adjective sense
1. brooding, broody, contemplative, meditative, musing, pensive, pondering, reflective, ruminative
deeply or seriously thoughtful
"Byron lives on not only in his poetry, but also in his creation of the `Byronic hero' - the persona of a brooding melancholy young man"
Source: WordNet® (An amazing lexical database of English)
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