From an unused root meaning to take off the shoes; unsandalled -- barefoot, being unshod.
H3182. yacheph
יָחֵף adjective barefoot, always absolute יָחֵף Isaiah 20:2 4t.; — וְיָחֵף עָרוֺם הלך 20:2 (מֵעַל תַחֲלֹץ נַעַלְךָ רַגְּלֶ֑ךָ in preceding clause), 20:3; יָחֵף הֹלֵךְ 2 Samuel 15:30; יָחֵף נָהַג Isaiah 20:3; apparently = substantive, מִיָּחֵף רַגְלֵךְ מִנְעִי Jeremiah 2:25 withhold thy foot from bareness (Syriac discalceatio).
יַחְצְאֵלִי יַחֲצִיאֵל, יַחְצְאֵל, see below חצה.