Cite this: eDIL s.v. andarbus or

n (derb) lit. uncertainty: a.¤ .i. merugud, ut est mac andarbais .i. mac bis i n-indeirbe fesa of uncertain parentage(?), O'Dav. 61 = mac andorbais, O'Curry 2232 ( Eg. 88, 16(17)d in a list of over twenty classes of children). ro marb Coirpre in Coel tria annarbus, RC xx 140.22 . ro reith . . . fóa 'nnarbus (leg. fó annarbus) he ran recklessly, LL 22443 = Folklore iii 514 § 51 (Bodl. Dinds.). Cf. inderbus.