(1) - Expletive (n.) A word, letter, or syllable not necessary to the sense, but inserted to fill a vacancy; an oath. (2) - Expletive (a.) Filling up; hence, added merely for the purpose of filling up; superfluous.
(1) - Explicate (v. t.) To unfold the meaning or sense of; to explain; to clear of difficulties or obscurity; to interpret. (2) - Explicate (v. t.) To unfold; to expand; to lay open. (3) - Explicate (a.) Evolved; unfolded.