/ ˈsɪŋkəpi; NAmE / noun
[ U ] ( phonetics ) the dropping of a sound or sounds in the middle of a word when it is spoken, for example the pronunciation of library as /ˈlaɪbri/
—compare apocope
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WORD ORIGIN
late Middle English : via late Latin from Greek sunkopē , from sun- together + koptein strike, cut off.