supplement
名词 supplement:
textual matter that is added onto a publication; usually at the end
同义词:addendum, postscript
a quantity added (e.g. to make up for a deficiency)
同义词:supplementation
a supplementary component that improves capability
同义词:accessory, appurtenance, add-on
动词 supplement:
add as a supplement to what seems insufficient
serve as a supplement to
add to the very end