> Og eftir jólin vekur Karlsefni við Eirík um ráðahag við Guðríði er
honum leist sem það mundi á hans forræði en honum leist kona fríð og
vel kunnandi.

> And after Jule Karsefni broached a question with Eirik concerning
marriage with Gudrid who seemed?? to him as it would (be) his concern
and (she) seemed ?? (couldn't figure out the infinitive of leist) to
him a beautiful and well educated woman.

"And after yule, K. broaches with Eirik the matter of marriage to G.,
since he (K.) felt that to be under his supervision/care (i.e. E.
would be the person responsible to 'giving' her away, so he had to
give his consent), and the woman appeared to him beautiful and very wise."

The infinitive is 'lítast' ('líta' + the reflexive/middle-voice
suffix). In normalised Old Icelandic spelling, the 3rd person
singular preterite indicative is 'leizk' (i.e. leit + -sk), later
'leizt', which in the standard modern spelling becomes 'leist'.