indefesse
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
Latin > English (Lewis & Short)
indēfessē: and indēfessim,
I advv., v. indefessus fin.
Latin > French (Gaffiot 2016)
indēfessē et -fēssim (indefessus), sans se lasser : Spart. Hel. 5, 10 ; Sid. Ep. 3, 2.