See again at epsilon 3788. The present headword, repeated there, is aorist active infinitive of a)neua/zw; it is perhaps extracted from Arrian, Anabasis 5.2.7.
For the cry Euoi! see also epsilon 3785, epsilon 3787. The chorus of Euripides' Bacchae might be said to do this, or Philodamus in his Paean to Dionysus (Eustathius, Commentary on Dionysius Periegetes 566.35). The prefix ana- implies the beginning of the action that follows. The verb is found both in this sense and in the sense of singing similar praises to another god or a person. Besides Arrian (above), see Lycophron, Alexandra 207; Nonnus 1.20,2.635,5.109; Greek Anthology 9.139.