φθαστέον
From LSJ
ἐγὼ δὲ λέγω ὑμῖν ὅτι πᾶς ὁ βλέπων γυναῖκα πρὸς τὸ ἐπιθυμῆσαι αὐτὴν ἤδη ἐμοίχευσεν αὐτὴν ἐν τῇ καρδίᾳ αὐτοῦ → But I am telling you that anyone who looks at a woman to the extent of lusting after her has already committed adultery with her in his heart (Matthew 5:28)
English (LSJ)
(φθάνω) one must anticipate, Herod.Med. ap. Orib.7.8.2.
Greek (Liddell-Scott)
φθαστέον: ῥηματ. ἐπίθ. τοῦ φθάνω, πρέπει τις νὰ προλάβῃ, Ὀρειβάσ. 131 Matth.