ἰθύς · ithys — LSJ
1 against, against, straight upwards
ἀνʼ ἰθύν,= against, πρὸς ῥόον ἀΐσσοντος ἀνʼ ἰθύν against the stream, Il. 21.303; ἐπεὶ δὴ σφαίρῃ ἀνʼ ἰθὺν πειρήσαντο in throwing straight upwards, Od. 8.377; πρὸς ἰθύν v.l. in Il. 14.403.
2 enterprise, mood, designs
enterprise, οἷσι μάλιστα πεποίθεα πᾶσαν ἐπʼ ἰθύν Od. 4.434; ἄριστοι πᾶσαν ἐπʼ ἰθύν ἐστε μάχεσθαί τε φρονέειν τε Il. 6.79; γυναικῶν γνώομεν ἰθύν their mood, designs, Od. 16.304; ἐμὴν ἰ. dub. in h.Ap. 539.