pertainest

Verb

pertain (third-person singular simple present pertains, present participle pertaining, simple past and past participle pertained)

1. (intransitive) To belong to or be connected as a part, adjunct, attribute, or accessory.
   • That spare wheel pertains to this car.

   Synonyms:

   belong

2. (intransitive) To relate to, concern, or be relevant to.
   • That question doesn't pertain to the topic, so I'm not going to answer it.

   Synonyms:

   relate, concern

3. (intransitive) To apply; to be or remain in place; to continue to be applicable.
   • An explanation offered is that every Sabbath Va'ani Tefilati is said in praise of the people of Israel, who, though they eat and drink, read the Torah and pray. However, on Yom Kippur this does not pertain.1996, Macy Nulman, The Encyclopedia of Jewish Prayer, page 340

   Synonyms:

   apply

4. To be appropriate or suitable.

   Synonyms:

   suit, befit