Meaning of -ER in English

-ER

I. adjective suffix or adverb suffix

Etymology: 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

— used to form the comparative degree of adjectives and adverbs of one syllable

hott er

dri er

and of some adjectives and adverbs of two or more syllables

complet er

beautifull er

II. noun suffix

also -ier or -yer

Etymology: Middle English -er, -ere, -ier, -iere; partly from Old English -ere (from Latin -arius ); partly from Old French -ier, -iere, from Latin -arius, -aria, -arium -ary; partly from Anglo-French -ere, from Latin -ator -or — more at -ary , -or

1.

a. : person occupationally connected with

furr ier

law yer

b. : person or thing belonging to or associated with

head er

old-tim er

c. : native of : resident of

cottag er

New York er

d. : one that has

three-deck er

e. : one that produces or yields

pork er

2.

a. : one that does or performs (a specified action)

batt er

— sometimes added to both elements of a compound

build er -upp er

b. : one that is a suitable object of (a specified action)

broil er

3. : one that is

foreign er

— in all senses -yer in a few words after w, -ier in a few other words, otherwise -er

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.