| 词汇 | prophylactic |
| 词根词缀 | 词源： prophylactic (adj.) 1574, originally of medicines, "that tends to prevent disease," from Gk. prophylaktikos "precautionary," from prophylassein "keep guard before, ward off," from pro- "before" + phylassein, Ionic variant of phylattein "to watch over, to guard," but also "cherish, keep, remain in, preserve." The noun is first recorded 1642, "a medicine or treatment to prevent disease;" meaning "condom" is from 1943, replacing earlier preventive (1822). Condoms originally were used more to prevent the spread of disease than pregnancy. |
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