English

extravasal

From extra- + vasal.

Proto-Indo-European *h₁éǵʰs ‘out’

Proto-Indo-European *h₁eǵʰsteros

Proto-Italic *eksteros

Latin exter ‘being on the outside’

Latin extrā ‘outside, except, beyond’

Latin vās

English vasal

Today it means

adj Outside of a (blood etc) vessel

Language periods are conventional ranges, not dates for this word.

Etymograph / extravasal