balloon (n.)youdaoicibaDictYouDict[balloon 词源字典]
1570s, "a game played with a large inflated leather ball," from Italian pallone "large ball," from palla "ball," from a Germanic source akin to Langobardic palla (from Proto-Germanic *ball-, from PIE *bhel- (2) "to blow, swell;" see bole) + -one, suffix indicating great size.

Perhaps also borrowed in part from French ballon (16c.), altered (after balle) from Italian pallone. It also meant the ball itself (1590s), which was batted back and forth by means of large wooden paddles strapped to the forearms. In 17c., it also meant "a type of fireworks housed in a pasteboard ball" (1630s) and "round ball used as an architectural ornament" (1650s). Acquired modern meaning after Montgolfier brothers' flights, 1783. As a child's toy, it is attested from 1848; as "outline containing words in a comic engraving" it dates from 1844. Also see -oon.[balloon etymology, balloon origin, 英语词源]
feather (v.)youdaoicibaDictYouDict
Old English fiðerian "to furnish with feathers or wings," from feðer (see feather (n.)). Meaning "to fit (an arrow) with feathers" is from early 13c.; that of "to deck, adorn, or provide with plumage" is from late 15c. In reference to oars (later paddles, propellers, etc.) from 1740, perhaps from the notion of the blade turned edgewise, or from the spray of the water as it falls off (compare nautical feather-spray, that produced by the cutwater of a fast vessel). The noun in reference to this is from the verb. Meaning "cut down to a thin edge" is from 1782, originally in woodworking. Phrase feather one's nest "enrich oneself" is from 1580s. Related: Feathered; feathering.
paddle (v.1)youdaoicibaDictYouDict
"to dabble, wade in water," 1520s, probably cognate with Low German paddeln "tramp about," frequentative of padjen "to tramp, to run in short steps," from pad (v.). Related: Paddled; paddling. Meaning "to move in water by means of paddles" is a different word (see paddle (v.3)).
paddle (v.3)youdaoicibaDictYouDict
"to move in water by means of paddles," 1670s, from paddle (n.). To paddle one's (own) canoe "do for oneself" is from 1828.