ventriloquial

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ven·tril·o·quism

V0057000 (vĕn-trĭl′ə-kwĭz′əm)n. The art of projecting one's voice so that it seems to come from another source, as from a wooden figure.
[From Latin ventriloquus, speaking from the belly : venter, ventr-, belly + loquī, to speak; see tolkw- in Indo-European roots.]
ven′tri·lo′qui·al (-trə-lō′kwē-əl) adj.