subferreus, -a, -um
eher eisern, unflexibel, unelegant: DECEMBRIO-PC
Plato rep Rho Lact err ed. Hankins p.609 Si quis custodum nepos

subaeneus nascetur aut subferreus, nihil misereantur aut indulgeant, uerum congruum naturae honorem tribuentes ad agricolas transmittant et opifices (
Plato rep 415C
ὑπόχαλκος ἢ ὑποσίδηρος). BISSELIVS
aest p.214 Ista Marcellinus, Stylo Militaris et amphibii Scriptoris subferreo: sed rei tamen gestae testimonio
αὐτοφώνῳ.