1.  pertain(v = verb.stative) bear on, come to, concern, have-to doe with, refer, relate, touch, touch on - be relevant to; "There were lots of questions referring to her talk"; "My remark pertained to your earlier comments"
Derived forms noun pertinence₁, noun pertinency₁, adjective pertinent₂
Sample sentences: Something is ----ing PP; Something ----s somebody; Something ----s something

2.  pertain(v = verb.stative) appertain - be a part or attribute of;
is one way to belong, belong to
Derived form adjective pertinent₁
Sample sentences: Something ----s to somebody

1.  To belong; to have connection with, or dependence on, something, as an appurtenance, attribute, etc.; to appertain; as, saltness pertains to the ocean; flowers pertain to plant life. [1913 Webster]
"Men hate those who affect that honor by ambition which pertaineth not to them." [1913 Webster]

2.  To have relation or reference to something. [1913 Webster]
"These words pertain unto us at this time as they pertained to them at their time." [1913 Webster]

pertain, v.intr.
1 (foll. by to) a relate or have reference to. b belong to as a part or appendage or accessory.
2 (usu. foll. by to) be appropriate to.

Etymology:
ME f. OF partenir f. L pertinere (as PER-, tenere hold)

pertain to