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The Collaborative International Dictionary
Disally

Disally \Dis`al*ly"\, v. t. [Pref. dis- + ally: cf. F. d['e]saltier.] To part, as an alliance; to sunder. [R.] ``Disallied their nuptials.''
--Milton.

Wiktionary
disally

vb. To part, as an alliance; to sunder.