Subtilize \Sub"til*ize\, v. t. [imp. & p. p. {Subtilized}; p. pr. & vb. n. {Subtilizing}.] [L. subtiliser.] 1. To make thin or fine; to make less gross or coarse. 2. To refine; to spin into niceties; as, to subtilize arguments. Nor as yet have we subtilized ourselves into savages. --Burke.