Intrinsic. Inward, internal, essential, real, genuine, true, inherent, native, innate, natural, immanent, inbred, inborn.
Ant. Extrinsic, acquired, apparent, accidental, borrowed, assumed, pretended, added, external, adventitious.
Introduce. Lead in, usher in, present, conduct in, commence, make acquainted, make known, begin, preface.
Ant. Come after, succeed, follow; end, conclude.
Introduction. Introducing, presentation, ushering in; preface, prelude, preamble, proem, exordium; induction, importation, insertion, commencement, preliminary; portico, gate, vestibule, entrance.
Ant. Eduction, ejection; extraction, exportation, elimination, estrangement; completion, conclusion, end; egress.
Introductory. Prefatory, initiatory, preliminary, precursory, preparatory; commendatory.
Ant. Final, conclusive, terminal, valedictory, supplemental; alienative.
Intrude. Obtrude, encroach, infringe, trespass, trench, interfere, meddle.
Ant. Withdraw, retire, recede; remove, retract.