"complimentary ticket," 1885, short for complimentary. Meaning "nonpaying guest" is attested by 1930s; generalized to "anything given free" by 1960s. As a verb, by 1974. Related: Comped; comping. As a shortening of compensation (especially worker's/workman's) it was in use by 1970s.
she took her comps in English literature
commutator
commute
commuter
Como
comorbidity
comp
compact
compaction
compactness
compactor
compadre
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