indefinable
From LSJ
οὗτος ἐγὼ ταχυτᾶτι· χεῖρες δὲ καὶ ἦτορ ἴσο → this is my speed: my hands and heart are its equal, such am I for speed; my hands and heart are just as good
Met., obscure: Ar. and P. ἀτέκμαρτος; see obscure, or use P. and V. τις (enclitic.).