Underlie :: Underlie (v. t.) To lie under; to rest beneath; to be situated under; as, a stratum of clay underlies the surface gravel..
Underlie :: Underlie (v. t.) To be at the basis of; to form the foundation of; to support; as, a doctrine underlying a theory..
Underlie :: Underlie (v. t.) To be subject or amenable to.
Underline :: Underline (v. t.) To mark a line below, as words; to underscore..
Underling :: Underling (n.) An inferior person or agent; a subordinate; hence, a mean, sorry fellow..