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The Collaborative International Dictionary
Ingeminating

Ingeminate \In*gem"i*nate\, v. t. [imp. & p. p. Ingeminated; p. pr. & vb. n. Ingeminating.] [L. ingeminatus, p. p. of ingeminare to double; pref. in- in + geminare. See Geminate.] To redouble or repeat; to reiterate.
--Clarendon.

. . . She yet ingeminates The last of sounds, and what she hears relates.
--Sandys.

Wiktionary
ingeminating

vb. (present participle of ingeminate English)