To belong to or be a part of, whether by right, nature, appointment, or custom; to relate to.
1551, James A.H. Murray editor, A New English Dictionary on Historical Principles: Founded Mainly on the Materials Collected by the Philological Society., volume 1, Oxford: Clarendon Press, published 1888, Part 1, page 217:
Also the rule of false position, with dyuers examples not onely vulgar, but some appertaynyng to the rule of Algeber.
In this great stretch of country there is no sign of life, nor of anything appertaining to life. There is no bird in the steel-blue heaven, no movement upon the dull, grey earth—above all, there is absolute silence. Listen as one may, there is no shadow of a sound in all that mighty wilderness; nothing but silence—complete and heart-subduing silence.