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sei

Ὦ ξεῖν’, ἀγγέλλειν Λακεδαιμονίοις ὅτι τῇδε κείμεθα τοῖς κείνων ῥήμασι πειθόμενοι. -> Go tell the Spartans, stranger passing by, that here, obedient to their laws, we lie.
Simonides of Kea

Latin > French (Gaffiot)

sei, v. si.

Latin > German (Georges)

sei, s. si.