συμπαῖσδεν

From LSJ

πολλὰ μεταξὺ πέλει κύλικος καὶ χείλεος ἄκρου → there is many a slip twixt cup and lip, there's many a slip twixt cup and lip, there's many a slip 'twixt cup and lip, there's many a slip twixt the cup and the lip, there's many a slip 'twixt the cup and the lip

Source

Greek (Liddell-Scott)

συμπαῖσδεν: Δωρ. ἀντὶ συμπαίζειν, Θεόκρ. 11. 77.

Russian (Dvoretsky)

συμπαῖσδεν: v. l. συμπαίσδεν дор. inf. к συμπαίζω.