musing

nouns

a calm, lengthy, intent consideration
contemplation, musing, reflection, reflexion, rumination, thoughtfulness
is derived from
muse

adjectives

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";
brooding, broody, contemplative, meditative, musing, pensive, pondering, reflective, ruminative