-er

-er ¹

suff.

1.

a. One that performs a specified action: swimmer.

b. One that undergoes or is capable of undergoing a specified action: broiler.

c. One that has: ten-pounder.

d. One associated or involved with: banker.

2.

a. Native or resident of: New Yorker.

b. One that is: foreigner.

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[Middle English, partly from Old English -ere (from Germanic *-rjaz, from Latin -rius, -ary), partly from Anglo-French -er (from Old French -ier, from Latin -rius) and partly from Old French -ere, -eor; see -or¹.]