Stupidity

google

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mid 16th century: from French stupide or Latin stupidus, from stupere ‘be amazed or stunned’.

wiktionary

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From Latin stupiditātem, accusative of Latin stupiditās, equivalent to stupid +‎ -ity.

etymonline

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stupidity (n.)

1540s, "want of intelligence," from Latin stupiditatem (nominative stupiditas) "dullness, stupidity, senselessness," from stupidus "confounded, amazed; dull, foolish" (see stupid). It also at various times meant "lack of feeling or emotion" (1560s); "stupor, numbness" (c. 1600).