ashamed, atrabiliar, atrabilious, blue, cogitative, cognitive, concentrating, concentrative, conceptive, conceptual, conceptualized, conscience-smitten, conscience-stricken, contemplating, contemplative, deliberating, deliberative, excogitating, full of remorse, funky, hankering, homesick, honing, ideative, introspective, languishing, longing, meditating, meditative, melancholic, melancholy, mental, museful, musing, noetic, nostalgic, pensive, pining, pondering, prehensive, reflecting, reflective, regretful, remorseful, repining, rueful, ruminant, ruminating, ruminative, self-accusing, self-condemning, self-convicting, self-debasing, self-flagellating, self-humiliating, self-punishing, self-reproaching, serious, shamefaced, shamefast, shameful, sober, sorry, speculative, thinking, thought, thoughtful, tristful, unhappy about, wishful, yearnful, yearning