I.to guide straight, direct, Aesch., Ar.; εὐθ. δόρυ to steer the bark straight, Eur.; εὐθ. πλάταν id=Eur.; εὐθ. χερσί to manage or guide him, Soph.
2.metaph. to direct, govern, Trag.
III.at Athens, to audit the accounts (cf. εὐθύνα) of a magistrate, call him to account, Plat.