The superlative form of 'odd'; the most unusual, strange, or peculiar.
From Old Norse 'oddi' (point of a triangle, odd number), originally meaning 'having a point' or 'unequal.' Evolved through 'odd numbers' to 'strange or peculiar things.'
Odd numbers are literally pointed and unequal while even numbers pair up—ancient peoples connected mathematics to strangeness, making 'odd' both a number and a personality trait through pure metaphor!
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