英语词源字典 - 在线词源网站

fond [fond 词源字典]: fond: [14] Fond originally meant ‘foolish’, and the likeliest explanation of its rather problematic origin is that it was a derivative of the Middle English noun fon ‘fool’ (its Middle English spelling fonned suggests that it was formed with the suffix -ed, just as wretched was formed from wretch). However, where fon (probably a relative of modern English fun) comes from is another matter.

Links with Swedish fåne ‘fool’ have been suggested but never established for certain. The adjective’s modern meaning ‘having a great liking’, incidentally, developed in the 16th century via an intermediate ‘foolishly doting’. Fondle [17] is a back-formation from the now obsolete fondling ‘foolish person’, a derivative of fond.
=> fondle, fun[fond etymology, fond origin, 英语词源]
canoodle (v.): "to indulge in caresses and fondling endearments" [OED], by 1850s, said to be U.S. slang, of uncertain origin. The earliest known sources are British, but they tend to identify the word as American. In the 1830s it seems to have been in use in Britain in a sense of "cheat" or "overpower." Related: Canoodled; canoodling.
fondle (v.): 1690s, "treat with indulgence and affection" (now obsolete), from fond (adj.) + frequentative ending. Or possibly from the obsolete verb fond "be fond, be in love, dote" (1520s), from the adjective or altered from earlier fon. Sense of "caress" first recorded 1796. As a noun from 1833. Related: Fondled; fondling (1670s as a past participle adjective); fondlesome.
gangling (adj.): "long and loose-jointed," by 1812, from Scottish and Northern English gang (v.) "to walk, go," which is a survival of Old English gangan, which is related to gang (n.). The form of the word is that of a present-participle adjective from a frequentative verb (as in fondling, trampling), but no intermediate forms are known. The sense extension would seem to be via some notion involving looseness in walking.
GANGLING. Tall, slender, delicate, generally applied to plants. Warw. [James O. Halliwell, "A Dictionary of Archaic and Provincial Words," 1846]
petting (n.): 1873, "fondling indulgence," verbal noun from pet (v.). Meaning "amorous caressing, foreplay" is from 1920 (in F. Scott Fitzgerald).