Zero, zefiro, zephirum, ṣifr (صِفْر), śūnya (शून्य), kha, ṣifr
Or the number that didn't exist
“There are nine Roman numerals: 9, 8, 7, 6, 5, 4, 3, 2, 1.
Cum his et cum signo 0, quod arabice dicitur zephirum, quilibet numerus scribitur.”
“The nine...
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