LATIN DICTIONARYLexicon Latīnum
adverb

fidēliter

fidēliter (comparative fidēlius, superlative fidēlissimē)
Classical[fɪˈdeː.lɪ.tɛr]Ecclesiastical[fiˈdɛː.li.ter]

Meaning

  1. faithfully, honestly

Lewis & Short A Latin Dictionary, 1879

fĭdēlĭter, adv., v. fidelis
I. fin.

Origins

Latin -ēlis Latin fidēlis Proto-Indo-European *-teros? Latin -ter Latin fidēliter From fidēlis (“faithful”) + -ter.