Humidity
来自Big Physics
late Middle English: from Old French humidite or Latin humiditas, from humidus (see humid).
wiktionary
From Middle English humidite, from Old French humidité, from Medieval Latin humiditas, from Latin umidus(“damp, moist, wet”).
Morphologically humid + -ity
etymonline
humidity (n.)
late 14c., "state or quality of being humid," from Old French humidité, umidité "dampness, humidity," from Latin humiditatem (nominative humiditas), from humidus "moist, wet" (see humid). In meteorology, "a measure of moisture in the air compared with the amount required to saturate it under current conditions (relative humidity), from 1820.
