exert
From LSJ
τους φίλους λόγων τέχναιν επαίδευσας → Using 2 artifices, you educated (taught) those who love rhetoric.
English > Greek (Woodhouse)
verb transitive
put in force: P. and V. χρῆσθαι (dat.); see exercise.
exert oneself: P. διατείνεσθαι, συντείνειν (or pass.), P. and V. τείνειν, V. ἐντείνειν (pass. also in P.); see labour, struggle.
exert yourself: P. σύντεινε σαυτόν (Plato, euthyphr. 12A).