LATIN DICTIONARYLexicon Latīnum
adverb

senīliter

senīliter (comparative senīlius, superlative senīlissimē)
Classical[sɛˈniː.lɪ.tɛr]Ecclesiastical[seˈniː.li.ter]

Meaning

  1. in the manner of an old person

Origins

From senīlis (“aged, senile”) + -ter, from senex (“old”).

Quick answers

What does senīliter mean in Latin?
senīliter, a adverb, means “in the manner of an old person”.
How do you pronounce senīliter?
In classical Latin, [sɛˈniː.lɪ.tɛr]; in ecclesiastical (church) Latin, [seˈniː.li.ter].