ta.cha.ra refers to a breastplate-like opening used as the comparison for a robe’s reinforced neck opening.

The two occurrences use the noun in a comparison: a robe’s central opening is made like the opening of a breastplate, with a surrounding edge to prevent tearing.

1. Breastplate-like opening · dominant

   In Exodus 28:32, the singular absolute noun occurs in the comparison for the garment’s head opening, which has a surrounding lip and is not to tear. In Exodus 39:23, the same singular absolute form again compares the robe’s middle opening with that of a breastplate; the APB renders both clauses with “the opening of a breastplate.”

   Exodus 28:32Exodus 39:23

In the Anselm Project Bible: The APB presents the term within the repeated comparison “like the opening of a breastplate” in both verses. The comparison rather than an isolated English token identifies its contribution.