niv denotes produce or yield, shown in a phrase about lips and in reference to food on the Lord's table.

The two construct-form occurrences point to produce or yield: in Isaiah it is associated with lips, while in Malachi it stands in the clause concerning the Lord's table and its food.

1. Produce or yield in constructed phrases · dominant

   Both occurrences are masculine singular construct nouns. In Isaiah 57:19 the form occurs in the phrase the APB renders "fruit of the lips," followed by the declaration of peace and healing; in Malachi 1:12 it occurs in the clause the APB renders as the Lord's table and "its food" being called contemptible.

   Isaiah 57:19Malachi 1:12

In the Anselm Project Bible: The APB explicitly renders the Isaiah clause "fruit of the lips." In Malachi it presents the surrounding clause as the Lord's table and "its food"; The term's precise English correspondence there is less certain.