loading; charging; filling
filling (up); replenishing; filling in (tooth); loading (gun with ammunition, camera with film, etc.); packing; plugging
compensating; making up for; supplementation
to insert; to put in (such that there is a snug fit); to have sex; to fuck; to pigeonhole (into a particular category); to place a ring-shaped object around something (esp. one that restricts freedom, such as handcuffs)
filler (for making plastic, rubber, etc.)
supplementation; replenishment; compensation; indemnification
loading material (for making paper); filler