Compare Leviticus. 11. The variations here, whether omissions or additions, are probably to be explained by the time and circumstances of the speaker.

Thou shall not eat any abominable thing. That is so either in its own nature, or because forbidden by the Lord; what are such are declared in the following verses.

WHAT MAY BE EATEN, AND WHAT NOT. (Deuteronomy. 14:3-21)
Thou shalt not eat any abominable thing--that is, anything forbidden as unclean (see on Leviticus 11:1).

With reference to food, the Israelites were to eat nothing whatever that was abominable. In explanation of this prohibition, the laws of Leviticus 11 relating to clean and unclean animals are repeated in all essential points in vv. 4-20 (for the exposition, see at Leviticus 11); also in Deuteronomy 14:21 the prohibition against eating any animal that had fallen down dead (as in Exodus 32:30 and Leviticus 17:15), and against boiling a kid in its mother's milk (as in Exodus 23:19).

Abominable - Unclean and forbidden by me, which therefore should be abominable to you.