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";
深く、またはひどく思慮深い
reflective
capable of physically reflecting light or sound; "a reflective surface"
物理的に光か音を反射することができる
reflective
devoted to matters of the mind; "the reflective type"