Pertain is defined as to relate or connect to something.(verb)
An example of pertain is for evidence to refer to a particular crime.
See pertain in Webster's New World College Dictionary
Origin: ME partenen < OFr partenir < L pertinere, to stretch out, reach < per-, intens. + tenere, to hold: see thin
See pertain in American Heritage Dictionary 4
intransitive verb per·tained, per·tain·ing, per·tains
Origin: Middle English pertenen, pertainen
Origin: , from Old French partenir
Origin: , from Latin pertinēre
Origin: : per-, per-
Origin: + tenēre, to hold; see ten- in Indo-European roots.
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