Filling

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Old English fyllan (verb), fyllu (noun) of Germanic origin; related to Dutch vullen and German füllen (verbs), Fülle (noun), also to full1.

filling (n.)

c. 1400, "that which fills or fills up," verbal noun from fill (v.). Dentistry sense is from 1848. Filling station attested by 1915.

filling (adj.)

"calculated to fill or satisfy," 1620s, present-participle adjective from fill (v.).