Kawaii (かわいい, [kaw͍aiꜜi], "lovable", "cute", or "adorable") is the quality of cuteness in the context of Japanese culture. It has become a prominent aspect of Japanese popular culture, entertainment, clothing, food, toys, personal appearance, behavior, and mannerisms.
The word kawaii originally derives from the phrase kao hayushi, which literally means "(one's) face (is) aglow," commonly used to refer to flushing or blushing of the face. The second morpheme is cognate with -bayu in mabayui (眩い, 目映い, or 目映ゆい) "dazzling, glaring, blinding, too bright; dazzlingly beautiful" (ma- is from 目 me "eye") and -hayu in omohayui (面映い or 面映ゆい) "embarrassed/embarrassing, awkward, feeling self-conscious/making one feel self-conscious" (omo- is from 面 omo, an archaic word for "face, looks, features; surface; image, semblance, vestige"). Over time, the meaning changed into the modern meaning of "cute", and the pronunciation changed to かわゆい kawayui and then to the modern かわいい kawaii. It is most commonly written in hiragana, かわいい, but the ateji, 可愛い, has also been appended. The kanji in the ateji literally translates to "able to be loved, can/may love, lovable."
The original definition of kawaii came from Lady Murasaki's The Tale of Genji, where it referred to pitiable qualities. During the Shogunate period under the ideology of neo-Confucianism, women came to be included under the term kawaii as the perception of women being animalistic was replaced with the conception of women as docile. However, the earlier meaning survives in the modern Standard Japanese adjectival noun かわいそう kawaisō (often written with ateji as 可哀相 or 可哀想) "piteous, pitiable, arousing compassion, poor, sad, sorry" (etymologically from 顔映様 "face / projecting, reflecting, or transmitting light, flushing, blushing / seeming, appearance"). Forms of kawaii and its derivatives kawaisō and kawairashii (with the suffix -rashii "-like, -ly") are used in modern dialects to mean "embarrassing/embarrassed, shameful/ashamed" or "good, nice, fine, excellent, superb, splendid, admirable" in addition to the standard meanings of "adorable" and "pitiable."