Is Adhering a Verb?

verb (used without object), ad·hered, ad·her·ing. to stay attached; stick fast; cleave; cling (usually followed by to): The mud adhered to his shoes.

What does it mean adhering?

intransitive verb. 1 : to hold fast or stick by or as if by gluing, suction, grasping, or fusing The stamp failed to adhere to the envelope. 2 : to give support or maintain loyalty adhere to traditional values. 3 : to bind oneself to observance adhere to the rules.

Is adherent a noun or verb?

noun. ad·​her·​ent | \ ad-ˈhir-ənt , əd- \