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The Collaborative International Dictionary
intervolve

intervolve \in`ter*volve"\, v. t. [imp. & p. p. intervolved; p. pr. & vb. n. intervolving.] [Pref. inter- + L. volvere, volutum, to roll.] To involve one within another; to twist or coil together.
--Milton.

Wiktionary
intervolve

vb. 1 (context rare English) To involve one with another. 2 (context rare English) To twist or coil together.