What does -ter mean in Latin?

-ter, a suffix, means “-ly; used to form adverbs from adjectives.”.

How do you pronounce -ter?

In classical Latin, [tɛr]; in ecclesiastical (church) Latin, [ter].

LATIN DICTIONARYLexicon Latīnum

suffix

-ter

-ter (comparative -ius, superlative -issimē)

Classical[tɛr]Ecclesiastical[ter]

Meaning

morpheme-ly; used to form adverbs from adjectives.

Origins

Perhaps ultimately from the nominative masculine singular of contrastive adjectives in Proto-Indo-European *-teros, later used more generally; perhaps extended from the suffix in prepositions like inter, praeter. Cognate with Ancient Greek -τερος (-teros).

Descendants

Old Occitan-tre

Quick answers

What does -ter mean in Latin?: -ter, a suffix, means “-ly; used to form adverbs from adjectives.”.
How do you pronounce -ter?: In classical Latin, [tɛr]; in ecclesiastical (church) Latin, [ter].