וַתִּקַּ֣ח יָעֵ֣ל אֵֽשֶׁת־חֶ֠בֶר אֶת־יְתַ֨ד הָאֹ֜הֶל וַתָּ֧שֶׂם אֶת־הַמַּקֶּ֣בֶת בְּיָדָ֗הּ וַתָּב֤וֹא אֵלָיו֙ בַּלָּ֔אט וַתִּתְקַ֤ע אֶת־הַיָּתֵד֙ בְּרַקָּת֔וֹ וַתִּצְנַ֖ח בָּאָ֑רֶץ וְהֽוּא־נִרְדָּ֥ם וַיָּ֖עַף וַיָּמֹֽת׃
Rashi on Judges
A tent peg. "Chevilles" in old French. This is embedded in the ground with the lower flap of the tent in order to extend it fully.
Metzudat David on Judges
A tent peg: The peg that is made to be planted into the ground [together] with the lower edges of the tent.