πρεσβεύειν
From LSJ
Greek > English (Woodhouse Verbs Reversed)
(see also πρεσβεύω): be ambassador, be best, be elder, be first born, be senior, give the first place to, go as ambassador, go on an embassy, have the first place, hold in honour, represent as ambassador
Lexicon Thucydideum
natu maximum esse, to be the eldest, 6.55.2 (de Hippia concerning Hippias),
legatos mittere, to send ambassadors, 1.67.2. 1.82.2. 1.91.4. 1.92.1, 1.126.1, 1.145.1. 2.7.3. 2.12.2. 3.85.3. 4.41.3. 6.75.3. 6.76.1. 6.104.2. 8.5.1. 8.7.1. 8.71.3.
legationem obire, to undertake an embassy, 1.31.3, 5.39.2. 8.89.2.