καθηγέομαι

A. act as guide, lead the way, abs., Hdt. 9.40,66, 6.135, Th. 6.4; οἱ κατηγεόμενοι the guides, Hdt. 7.130; σὺ καθηγοῦ, ἕψομαι δ’ ἐγώ Pl. Ep. 312b; κατ. τινὶ ἐς Χώρους Hdt. 4.125, cf. 6.102; ἐπὶ Φωκέας Id. 7.215; also κατ. τινὶ ὁδόν Id. 9.104.

2. c. acc. rei, show, explain, indicate, τὸ ἕρμα κατ. τινί Id. 7.183, cf. X. An. 7.8.10; ὁ τὸν ποταμὸν κ. he who was explaining it, i.e. showing where it was fordable, Pl. Tht. 200e.

3. c. gen., κ. τοῦ λόγου to begin the discourse, Id. Smp. 199c; ὧν καθηγήσαιτ’ ἂν τοῦτο of which this would be the beginning, Id. La. 182c.

b. lead, command, exercise authority over, κ. τῆς στρατείας, τοῦ πολιτεύματος, Plu. Cam. 15, Thes. 35.

4. to be the first to do, establish, institute, Hdt. 2.49,56: c. part., οὐ κατηγήσομαι νόμον τόνδε τιθείς I will not begin establishing this law, Id. 7.8.ά.

5. instruct, teach, abs., Phld. Lib. p.21 O., al.; κ. γραμματιστοῦ τρόπον Diog.Oen. 11; ὁ καθηγησάμενος the teacher, Plu. 2.120a: c. gen. pers., to be teacher of . . , Str. 14.5.14, D.H. Is. 1, Amm. 5.

6. in Logic, to be antecedent, Stoic. 2.72.