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late 14c., "self-restraining," from Old French continent and directly from Latin continentem (nominative continens) "holding together, continuous," present participle of continere "hold together" (see contain). Meaning moved from "exercising self-restraint" to "chaste" 14c., and to bowel and bladder control 19c.
"large land mass," 1550s, from continent land (mid-15c.), translating Latin terra continens "continuous land," from continens, present participle of continere (see continent (adj.)).