sourness

n [U]: the sourness of the fruit 水果的酸味 * the sourness of her expression 她满脸不悦.

sound-recording, sound-track, sound-wave, sounding, sounding-board, soundings, soundless, soundlessly, soundly, soundness, sounds, soup, soup-kitchen, soup-plate, soupcon, sour, sour cream, source, sourdough, sourly, sourpuss, souse, soused, south, south (also South), South Africa, South African, South American, south-east (also ,South-East), south-easter, south-easterly, south-eastern, south-west (also ,South-West), south-wester, south-westerly, south-western, Southampton, southbound, southeast, southerly,