ad·here 
(ăd-hîr)
(ăd-hîr)v. ad·hered, ad·her·ing, ad·heres
v.intr.
1. To stick fast to something; stay attached: Glue makes the wallpaper adhere to the wall.
2. To remain devoted to or be in support of something: adhered to her beliefs.
3. To carry out a plan, scheme, or operation without deviation: We will adhere to our plan.
v.tr.
To cause to adhere; make stick.
[French adhérer, from Latin adhaerēre, to stick to : ad-, ad- + haerēre, to stick.]