or סֻס; from an unused root meaning to skip (properly, for joy); a horse (as leaping); also a swallow (from its rapid flight); crane, horse (-back, -hoof). Compare פָּרָשׁ.
or (feminine) עִקְּבָה; from עָקַב; a heel (as protuberant); hence, a track; figuratively, the rear (of an army); heel, (horse-) hoof, last, lier in wait (by mistake for עָקֵב), (foot-) step.