in·tru·sive 
(ĭn-trsĭv, -zĭv)
(ĭn-trsĭv, -zĭv)adj.
1. Intruding or tending to intrude.
2. Geology Of or relating to igneous rock that is forced while molten into cracks or between other layers of rock.
3. Linguistics Epenthetic.
in·trusive·ly adv.
in·trusive·ness n.