Underlie

(v. t.) To lie under; to rest beneath; to be situated under; as, a stratum of clay underlies the surface gravel.

Underlie - Other Definitions

(v. t.) To lie under; to rest beneath; to be situated under; as, a stratum of clay underlies the surface gravel.
(v. t.) To be at the basis of; to form the foundation of; to support; as, a doctrine underlying a theory.
(v. t.) To be subject or amenable to.
(v. i.) To lie below or under.
(n.) See Underlay, n., 1.