with-

The story

1. Proto-Germanic · inherited from*wiþi-“counter-, anti-, gain-, with-”
2. Proto-West Germanic · inherited from*wiþi-
3. Old English · inherited fromwiþ-“against, away”
4. Middle English · inherited fromwith-
5. English todaywith-

From Middle English with-, from Old English wiþ- (“against, away”, prefix), from Proto-West Germanic *wiþi-, from Proto-Germanic *wiþi- (“counter-, anti-, gain-, with-”), related to Old English wiþ (“with, by, near, against, beside, at, through, for, in return, opposite, towards, to”, preposition). Cognate with Old Frisian with-, Old Saxon with-, Danish ved-, Swedish vid-, Faroese við-, Icelandic við-. Related also to English wither-, and Dutch weder- (“back”), German wider- (“against”), German wieder- (“again”). More at with.