The Collaborative International Dictionary
Subtilized
Subtilize \Sub"til*ize\, v. t. [imp. & p. p. Subtilized; p. pr. & vb. n. Subtilizing.] [L. subtiliser.]
To make thin or fine; to make less gross or coarse.
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To refine; to spin into niceties; as, to subtilize arguments.
Nor as yet have we subtilized ourselves into savages.
--Burke.
Wiktionary
subtilized
vb. (en-past of: subtilize)