Strong's Hebrew: 8672. tesha' (tay'-shah)
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8672. tesha' (tay'-shah)
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Or (masculine) tishtah {tish-aw'}; perhaps from
sha'ah
through the idea of a turn to the next or full number ten; nine or (ord.) Ninth -- nine (+ -teen, + -teenth, -th).
see HEBREW
sha'ah
Strong's Numbers Online Bible Dictionary