insubstantiated
/ˌĭ n s ə b ˈs t ă n ˌch ē ā t ə d, ˌĭ n s ə b ˈs t ă n ˌsh ē ā t ə d/
ĭn-sub-stăn-tï-āt-ed, ĭn-sub-stăn-tï-āt-ed
Rule 1
Vowels usually say their short sound in a closed syllable.
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