-er
1-er
adj suffix or adv suffixDefinition of -ER
—used to form the comparative degree of adjectives and adverbs of one syllable <hotter> <drier> and of some adjectives and adverbs of two or more syllables <completer> <beautifuller>
Origin of -ER
Middle English -er, -ere, -re, from Old English -ra (in adjectives), -or (in adverbs); akin to Old High German -iro, adjective comparative suffix, Latin -ior, Greek -iōn
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