From an unused root meaning to butt; a buck or he-goat (as given to butting) -- he goat.
H8495. tayish
[תַּ֫יִשׁ] noun masculine he-goat (Late Hebrew id.; Arabic Aramaic תֵּישָׁא תְּיָשָׁא, id., √ unknown); — absolute תָּ֑יִשׁ Proverbs 30:31; plural תְּיָשִׁים Genesis 30:35 (J), 32:15 (E; + עִזִּים she-goats), 2 Chronicles 17:11.
תֹּךְ see תכך. below.