adjective

1. (of a state, quality, or emotion) very great or intense. "profound feelings of disquiet" синонимы: heartfelt, intense, keen, great, very great, extreme, sincere, earnest, deep, deepest, deeply felt, wholehearted, acute, overpowering, overwhelming, deep-seated, deep-rooted, fervent, ardent, far-reaching, radical, extensive, exhaustive, thoroughgoing, sweeping, life-changing
2. (of a person or statement) having or showing great knowledge or insight. "a profound philosopher" синонимы: wise, learned, clever, intelligent, with/showing great knowledge, knowledgeable, intellectual, scholarly, sage, sagacious, erudite, discerning, penetrating, perceptive, astute, thoughtful, full of insight, insightful, percipient, perspicacious, philosophical, deep, sapient
3. very deep. "profound crevasses"

noun

the deepest part of something, especially the ocean. "nor billowy surge disturbs the vast profound"