τρι?βω (cf. τείρω), inf. τρι_βέμεναι, aor. ἔτρι_ψα,
inf. τρῖψαι: rub, hence
thresh corn (by treading out with oxen, see cut),
Il. 20.496
; μοχλὸν ἐν ὀφθαλμῷ,
‘plunge’ we should say (cf. ‘rubbed
in’), Od. 9.333; pass. and
fig., wear oneself out, Il.
23.735.