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From Middle English odde, od (“odd (not even); leftover after division into pairs”), from Old Norse oddi (“odd, third or additional number; triangle”), from oddr (“point of a weapon”), from Proto-Germanic *uzdaz (“point”), from Proto-Indo-European *wes- (“to stick, prick, pierce, sting”) + *dʰeh₁- (“to set, place”). Cognate to Icelandic oddi (“triangle, point of land, odd number”), Swedish udda (“odd”), udd (“a point”), Danish od (“point of weapon”) and odde (“a headland, point”), Norwegian Bokmål odde (“a point”, “odd”, “peculiar”); related to Old English ord (“a point”). Doublet of ord ("point").