Ob·tru·sive a. Disposed to obtrude; inclined to intrude or thrust one's self or one's opinions upon others, or to enter uninvited; forward; pushing; intrusive. -- Ob*tru*sive*ly, adv. -- Ob*tru*sive*ness, n.
Not obvious, not obtrusive, but retired. --Milton.
adv : in an obtrusive manner [ant: unobtrusively]