aséirig

Old Irish

From ess- +‎ at·reig (without the infixed pronoun), a calque of Latin resurgō, itself a calque of Ancient Greek ἀνίστημι (anístēmi).

as·éirig (verbal noun esséirge)

c. 800, Würzburg Glosses on the Pauline Epistles, published in Thesaurus Palaeohibernicus (reprinted 1987, Dublin Institute for Advanced Studies), edited and with translations by Whitley Stokes and John Strachan, vol. I, pp. 499–712, Wb. 13^b12
Masu glé lib trá in precept ro·pridchus-sa .i. as·réracht Críst hó marbaib, cid dia léicid cundubairt for drécht úaib de resurrectione hominum?
If, then, what I have preached is clear to you, namely that Christ has risen from the dead, why do you pl leave doubt on a portion of you concerning the resurrection of humans?
(literally, “…the preaching that I have preached…”)

Complex, class B I present, t preterite, unreduplicated s future, s subjunctive

Note: the future and the present subjunctive have the same form, as do the conditional and the past subjunctive. The forms are listed here as being future/conditional, but in context they could also be present/past subjunctive.

Old Irish mutation
Radical	Lenition	Nasalization
as·éirig (pronounced with /h/ in h-prothesis environments)	unchanged	as·n-éirig
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.