Answer: occludes

AnswerCrossword Clue
OCCLUDESConceals
OCCLUDESStops up.
OCCLUDESCloses.
OCCLUDESCloses, as a passage
OCCLUDESBlocks
occludesOCCLUDE, to stop up
occludes(of a solid) Absorb and retain (a gas or impurity)
occludesCover (an eye) to prevent its use
occludesStop, close up, or obstruct (an opening, orifice, or passage)
occludes(of a tooth) Close on or come into contact with another tooth in the opposite jaw
occludesShut (something) in