πᾰνηγῠρ-ίζω · panēgyr-izō — LSJ
celebrate or attend a public festival, πανηγύριας π. keep holy-days, Hdt. 2.59; Ὀλύμπια καὶ Κάρνεια π. Plu. Herod. 2.873e; τὴν τῶν ἐπινικίων ἡμέραν POxy. 705.35 (iii A. D.): abs., PSI 4.374.15 (iii B. C.); π. ἐς πόλιν go to a city to attend a festival, Hdn. 1.9.2: metaph., enjoy oneself, Alex. 219.17, Ael. VH 13.1.
frequent fairs or markets, App. Pun. 116.
later, make a set speech in a public assembly, deliver a panegyric, Isoc. 5.13, Plu. Praec. 2.802e.
Pass., sound as at a festival, of flutes, etc., Heraclit. All. 9.