From the same as yowm; a warm spring -- mule.
see HEBREW yowm
H3222. yem
or yemim יֵמִם noun [masculine] apparently plural meaning dubious; only in בַּמִּדְבָּר אֶתהַֿיֵּמִם מָצָא אֲשֶׁר עֲנָה הוּא Genesis 36:24 that is the `Ana that found the יֵסִם in the wilderness when he was pasturing the asses of ‚ib±œn his father; perhaps hot springs, ᵑ9 aquae calidae; so Thes MV DechentZPV vii. 1884, 172 and others; yet no suitable √ ימה (or ימם) known; see further Di BuhlEdomiter 46.