εἶμεν
From LSJ
θοῦ, Κύριε, φυλακὴν τῷ στόµατί µου καὶ θύραν περιοχῆς περὶ τὰ χείλη µου → set a guard over my mouth, Lord; keep watch over the door of my lips | set a guard, O Lord, over my mouth; keep watch over the door of my lips (Psalm 140:3, Septuagint version)
French (Bailly abrégé)
inf. prés. dor. de εἰμί;
1ᵉ pl. opt. de εἰμί (par contr. att. p. εἴημεν).
Greek (Liddell-Scott)
εἶμεν: (= ἰέναι) ἐφ’ ᾧ αὐτὰν ἐλευθέραν εἶμεν ποιεῖν ὃ κα θέλῃ, εἶμεν εἶ κα θέλῃ Ἐπιγρ. Δελφῶν W. et F. 336.
Russian (Dvoretsky)
εἶμεν:
1) дор. inf. к εἰμί;
2) (= εἴημεν) 1 л. pl. opt. к εἰμί.