From *exs + *-teros. *<span class="searchmatch">exteros</span> outside <span class="searchmatch">Proto</span>-Brythonic: Middle Welsh: eithyr, eythyr, eithr Welsh: eithr Old Irish: echtar, echtra Irish: eachtra, eachtar-...
From <span class="searchmatch">Proto</span>-Indo-European *h₁eǵʰs. Cognate with Latin ex. *exs out of from *exs- *<span class="searchmatch">exteros</span> <span class="searchmatch">Proto</span>-Brythonic: *ex Old Breton: ech Middle Welsh: ech Welsh:...
descendants) *h₁éǵʰs-teros Proto-Celtic: *<span class="searchmatch">exteros</span> (“outside (of), without”) (see there for further descendants) <span class="searchmatch">Proto</span>-Italic: *eksteros Latin: exterus, exter...