The story
- Proto-Indo-European*wed-
- Proto-Germanic*wētaz
- Proto-West Germanic*wāt
- Old Englishwǣt
- Middle Englishwet
- Englishwet
- Proto-Indo-European*bʰeg-der.?
- Proto-Germanic*baką
- Proto-West Germanic*bak
- Old Englishbæc
- Middle Englishbak
- Englishback
- English todaywetback
First used in the 1920s from the presumed effects of swimming or wading across the Rio Grande. Used by the U.S. Government in 1954 with Operation Wetback.
Etymology from Wiktionary, CC BY-SA 4.0.