From Longman Dictionary of Contemporary Englishappertainap‧per‧tain /ˌæpəˈteɪn $ -ər-/ verb → appertain to something→ See Verb table
Examples from the Corpus
appertain• Next Trent had listed those facts appertaining to his own role.Origin appertain (1300-1400) Old French apartenir, from Late Latin appertinere, from Latin ad- “to” + pertinere ( → PERTAIN) 