pintle
Pintle (noun) means a small pin on a belt buckle that fits into a hole to keep the belt fastened at the right tightness.
Etymology
Came into English via Middle English pyntel, from Old English pintel ("penis"), from Proto-West Germanic *pint(i), from Proto-Germanic *pint- ("protrusion"), from Proto-Indo-European *bend- ("peg, tip, protruding point, edge"); equivalent to pin + -le. It is cognate with North Frisian pint ("male member, penis"), West Frisian pyt ("male member, penis"), Dutch piet ("penis"), German Low German and German Pint ("penis"), West Flemish pint, piet ("tip, spike, penis"), Danish pint, pintel ("penis"), Norwegian dialectal pintol ("penis"), and dialectal Swedish pitt ("penis"). See also pin, pen.