ἀπτέρωτος

ον
A. unfeathered, of arrows or bolts, IG 2.809e19.
II. ἀπτέρωτα· ταχέα, αἰφνίδια, Hsch.; cf. ἀπτερέως, ἄπτερος III.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project