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Pronunciation of 

optimistic

view main entry for optimistic adjective  /ˌɑptɪˈmɪstɪk/
British English pronunciation: optimisticClick to listen to the pronunciation of optimistic

derived word

optimistically

  /ˌɑptɪˈmɪstɪkli/ adverb
British English pronunciation: optimisticallyClick to listen to the pronunciation of optimistically
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nanodegree

a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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Open Dictionary

hypocaust

an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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