英语词源字典 - 在线词源网站

burdensome (adj.): 1570s, from burden (n.1) + -some (1). Earlier was burdenous (1520s). Related: Burdensomeness.
condensate (v.): 1550s, "to make dense," from condens-, past participle stem of Latin condensare (see condense) + -ate (2). Meaning "to become dense" is from c. 1600.
condensation (n.): c. 1600, "action of becoming more dense," from Latin condensationem (nominative condensatio), noun of action from condensare (see condense). Meaning "conversion of a gas to a liquid" is from 1610s.
condense (v.): early 15c., from Middle French condenser (14c.) or directly from Latin condensare "to make dense," from com-, intensive prefix (see com-), + densare "make thick," from densus "dense, thick, crowded," a word used of crowds, darkness, clouds, etc. (see dense).
condensed (adj.): c. 1600, "made more dense," past participle adjective from condense. Of literary works, from 1823. Condensed milk attested by 1863.
condenser (n.): 1680s, agent noun from condense. Given a wide variety of technical uses in late 18c. and 19c.
dense (adj.): early 15c., from Middle French dense and directly from Latin densus "thick, crowded; cloudy," perhaps from PIE root *dens- "dense, thick" (cognates: Greek dasus "hairy, shaggy"). Sense of "stupid" is first recorded 1822.
density (n.): c. 1600, from French densité (16c.), from Old French dempsité (13c.), from Latin densitas "thickness," from densus "thick, dense" (see dense).
Waldensian: c. 1600, from Waldenses (plural), mid-15c., from Medieval Latin, apparently from Waldensis, a variant form of the surname of Peter Waldo, the preacher who originated the sect c.1170 in southern France. Excommunicated 1184, they eventually were swept into the Protestant revolt (16c.).
densimeter: "An instrument for measuring density, especially of liquids", Mid 19th century: from Latin densus 'dense' + -meter.