From an unused root meaning to portion out; a sort, i.e. Species -- kind. Compare min.
see HEBREW min
H4327. min
[מִין] noun [masculine] kind, species (Late Hebrew id. (Ecclus 43:25 id.), also schismatic, heretic; Jewish-Aramaic מִינָא, species; Palestinian Syriac = nation PS2094 SchwIdioticon 50; yet not Aramaic loan-word in Hebrew; see LagBN 183 f.); — always suffix + preposition לְמִינֵהוּ Genesis 1:12 (twice in verse) + 2t.; לְמִינוֺ 1:11 (omitted by ᵐ5) + 3 t.; לְמִינָהּ 1:24 (twice in verse) + 9 t.; לְמִינָהֿ Ezekiel 47:10 (strike out Co); לְמִינֵהֶם Genesis 1:21; — kind, species, of plant 1:11-12, (twice in verse); usually of animal (beast, bird, fish, insect) 1:21-22, 24 (twice in verse); 1:25 (3 t. in verse); 6:20 (3 t. in verse); 7:14 (4 t. in verse); Leviticus 11:14-15, 16, 19, 22 (4 t. in verse); 11:29 (all P); also Deuteronomy 14:13-14, 15, 18 (compare Leviticus) Ezekiel 47:10 (on text, compare Co).