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The Collaborative International Dictionary
Symphonizing

Symphonize \Sym"pho*nize\, v. i. [imp. & p. p. Symphonized; p. pr. & vb. n. Symphonizing.] To agree; to be in harmony. [R.]
--Boyle.

Wiktionary
symphonizing

vb. (present participle of symphonize English)