rugaen.
ɡaɪ
中文n. 皱褶（ruga的复数）
词根词源
rugae (n.)plural of ruga (1775), from Latin ruga "a wrinkle in the face," from PIE *rug-, variant of *reue- (2) "to smash, knock down, tear up, dig up, uproot" (see rough (adj.)).
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