sin tacha
From LSJ
Τραφὲν ὄρεσι καὶ φάραγξιν ἀγρίαις, κήρυξ πέφυκα τῆς λόγου ὑμνῳδίας. Φωνήν μὲν οὐκ ἔναρθρον, εὔηχον δ' ἔχω (Byzantine riddle) → Raised in the mountains and wild ravines, I have become the herald of hymns that are sung. I have no articulate voice...
Spanish > Greek
ἐντελής, ἀψεγής, ἄμωμος, ἀμώμητος, ἀσήμαντος, ἄπτωτος, ἀνεπιμώμητος, ἀμωλώπιστος, ἀνεπίκλητος, ἄσπιλος