Where does “ok” come from?

ok (Middle English) comes from Old Norse ok, from Old Norse svá, from Proto-Germanic swa, from Proto-Germanic swē, from Proto-Indo-European swē — self (reflexive pronoun).

ok (Middle English): oak tree of the genus

Definitions

oak tree of the genus

Ancestry of “ok”, step by step

ok traces back through two separate lines of ancestry.

via Old Norse ok

Step	Language	Word	Meaning
1	Old Norse	ok	and; also, too; yoke
2	Old Norse	svá	so
3	Proto-Germanic	swa	so, thus, in this manner
4	Proto-Germanic	swē	like, similar to; just like, in the same manner...
5	Proto-Indo-European	swē	self (reflexive pronoun)

via Old English āc

Step	Language	Word	Meaning
1	Old English	āc	oak; oaken ship
2	Proto-West Germanic	ak	but
3	Proto-Germanic	ak	but, however
4	Proto-Indo-European	h₁o-ge	—

Every word from Proto-Indo-European swē →Every word from Proto-Germanic swē →Every word from Proto-Germanic swa →