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adjective
intellectual, thoughtful
Synonyms: abstruse, acroamatic, deep, difficult, discerning, enlightened, erudite, esoteric, heavy, hermetic, informed, intellectual, intelligent, knowing, knowledgeable, learned, mysterious, occult, Orphic, penetrating, philosophical, recondite, reflective, sagacious, sage, scholarly, secret, serious, shrewd, skilled, subtle, thorough, weighty, wise
Antonyms: ignorant, stupid
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adjective
bottomless
Synonyms: abysmal, buried, cavernous, deep, fathomless, subterranean, yawning
Antonyms: shallow, slight
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adjective
intense; emotional
Synonyms: abject, absolute, acute, consummate, deep, deeply felt, deep-seated, exhaustive, extensive, extreme, far-reaching, great, hard, heartfelt, heartrending, hearty, keen, out-and-out, pronounced, sincere, thorough, total, utter
Antonyms: mild, moderate, unemotional