ἀχάρακτος

ον
A. not marked or branded, κάμηλος BGU 13.8 (iii A. D.); not stamped, Ath.Mitt. 33.384 (Pergam.); of ships, without emblem or figurehead, PLille 22.6; not graven or cut, Nonn. D. 13.84; that cannot be cut, σιδήρῳ γυῖα ἀ. ib.16.158, cf. 26.242.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project