occluding is a form of:

Occlude



verb
1.
(TRANSITIVE) (to lose, to block, to shut in, to shut out, to refain, to meet with the cusps fitting closely) ធ្វើអោយជិត, បិទ
ENGLISH MEANING
verb
1.
(TRANSITIVE) To shut up; to close.
2.
(TRANSITIVE) To take in and retain; to absorb; -- said especially with respect to gases; as iron, platinum, and palladium occlude large volumes of hydrogen.