interpose

v. (-sing) 1 (often foll. By between) insert (a thing) between others. 2 say (words) as an interruption; interrupt. 3 exercise or advance (a veto or objection) so as to interfere. 4 (foll. By between) intervene (between parties).  interposition n. [latin pono put]

v. t. To place between; as, to interpose a screen between the eye and the light.