adhesion (n.)

1620s, "act or state of sticking or being stuck, a being united or attached," from French adhésion or directly from Latin adhaesionem (nominative adhaesio) "a sticking to," noun of action from past-participle stem of adhaerare "to stick to, cling to," from ad "to" (see ad-) + haerere "to stick" (see hesitation). The earliest English use is of persons ("faith is adhesion unto God"), but "Adhesion is generally used in the material, and adherence in the metaphysical sense." [Johnson]