would that
From LSJ
English > Greek (Woodhouse)
v. trans.
Refering to a future wish: P. and V. εἴθε (opt.), εἰ γάρ (opt.), V. εἰ (opt.). Ar. and V. πῶς ἄν (opt.).
Referring to a past wish: P. and V. εἴθε (imperf. or aor. indic.). εἰ γάρ (imperf. or aor. indic.), ὤφελον (infin.), εἴθʼ ὤφελον (infin.), εἰ γὰρ ὤφελον (infin.).