εἰσέχω · eisechō — LSJ
stretch into, running in, opened into, shining
stretch into, κόλπος ἐκ τῆς βορηΐης θαλάσσης ἐσέχων ἐπὶ Αἰθιοπίης a bay running in from the north sea towards Ethiopia, Hdt. 2.11 ; ἡ μεγίστη τῶν διωρύχων ἐσέχει ἐς ποταμόν Id. 1.193 ; ἦν θάλαμος ἐσέχων ἐς τὸν ἀνδρεῶνα the chamber opened into the menʼs apartment, Id. 3.78 ; ἐς τὸν οἶκον ἐσέχων ὁ ἥλιος the sun shining into the house, Id. 8.137 : abs., ἐκ τοῦ Νείλου διώρυχες ἐσέχουσι (sc. ἐς τὴν γῆν) Id. 2.138.
II the retiring part, the shade
in pictures, τὸ ἐσέχον is the retiring part, the shade, opp. ἐξέχον (the high lights), Philostr. VA 2.20.
b hollow
στέρνα ἐσέχοντα hollow chests, Id. Gym. 35.