intrusive
adjective
°Tending or apt to intrude; doing that which is not welcome; interrupting or disturbing; entering without right or welcome.
"Did it ever cross your mind that he might find all those questions you ask intrusive?"
°Of rocks: forced, while in a plastic or molten state, into the cavities or between the cracks or layers of other rocks.
noun
°An igneous rock that is forced, while molten, into cracks or between other layers of rock.