παρακελεύεσθαι
From LSJ
ἄλογον δὴ τὸ μήτε μάχης ἄρξασθαι μήτε τοὺς φίλους φυλάξαι, ἐὰν ὑπό γε τῶν βαρβάρων ἀδικῆσθε → It is irrational neither to begin battle nor to guard the friends, if you are ever wronged by the foreigners
Greek > English (Woodhouse Verbs Reversed)
(see also παρακελεύομαι): exhort, encourage one another, exhort troops, of a general addressing troops
Lexicon Thucydideum
cohortari, to encourage, exhort, 2.86.6, 2.88.1, 2.90.1. 4.9.4. 4.11.1. 4.25.9, 4.94.2. 4.96.1. 4.96.14.125.4, 6.67.3, 6.68.3. 6.69.1. 6.78.4. 7.44.4, 7.60.5. 7.63.2, 7.65.1. 7.65.3, 7.69.1. 7.78.1. 8.54.4, 8.64.1.