Other forms: dubbed, dubbing, dubs
To dub a film is to replace the original speech with another language. New voices, the same lips, never quite matching.
Dubbing is an industry of its own wherever subtitles are not the habit, and a dubbed version is what much of Europe grew up watching. The word has two other lives that catch people out. To dub somebody is to give them a nickname, which journalism does constantly. And to dub a knight is to make one, by touching each shoulder with a sword, which is the oldest sense of the three.
Proto-Indo-European
*dʰewbʰ- — plug, peg, wedge
Proto-Germanic
*dub- — to hit, strike
Proto-West Germanic
*dubbōn
Old French
adober — to equip with arms; adorn
Old English
dubbian — to knight by striking with a sword, dub
Middle English
dubben
English, today
dub
From Middle English dubben, from Old English dubbian (“to knight by striking with a sword, dub”) from Old French adober (“to equip with arms; adorn”) (also 11th century, Modern French adouber), both from Proto-West Germanic dubbōn, from Proto-Germanic dub- (“to hit, strike”), from Proto-Indo-European dʰewbʰ- (“plug, peg, wedge”). Cognate with Icelandic dubba (in dubba til riddara). Compare also drub for an English reflex of the Germanic word.
Etymology from Wiktionary, CC BY-SA