ἀραίωσις
From LSJ
Τοὺς τῆς φύσεως οὐκ ἔστι λανθάνειν (μανθάνειν) νόμους → Legibus naturae non potest evadier → Naturgesetze keiner insgeheim verletzt
English (LSJ)
εως, ἡ,
A becoming or making porous, rarefaction, opp. πύκνωσις, dub. in Epicur.Nat.14Fr.11 (cf. Fr.6), cf. Plu.Strom.3, D.L.9.8 (Heraclit.), Corn.ND17, etc. 2 Medic., porosity, of the lungs, Hp. Oss.13, etc. 3 mordanting, PHolm. 8.3.