make knobby → τυλόω, τυλῶ, τυλόομαι, τυλοῦμαι

[spiros]

τυλόω, τυλῶ, τυλόομαι, τυλοῦμαι

Are both the passive forms acceptable?

[billberg23]

The verb τυλοῦμαι is simply the contracted form of  τυλόομαι (ο + ο → οῦ), just as τυλῶ is the contracted form of τυλόω (ο + ω → ῶ).  Cf. Allen p. 272 https://archive.org/details/firstyearofgreek00alle/page/272.  If you're Herodotus, you prefer τυλόομαι;  if Demosthenes, τυλοῦμαι.  (-:

[spiros]

Right, I did not see many hits for τυλοῦμαι .

[billberg23]

Maybe that's because it's hard for anyone to say "I am made knobby" in any language.  You'd probably get more hits from 3rd pers. sing. τυλοῦται.  :-)