σπείσω

From LSJ

ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)

Source

Russian (Dvoretsky)

σπείσω: fut. к σπένδω.

Dutch (Woordenboekgrieks.nl)

σπείσω ind. fut. act. van σπένδω.