נִדְב֣וֹת פִּ֭י רְצֵה־נָ֣א יְהוָ֑ה וּֽמִשְׁפָּטֶ֥יךָ לַמְּדֵֽנִי׃
Ofiary ust moich upodobać racz Boże, a praw Twoich naucz mnie.
Rashi on Psalms
The freewill offering of my mouth Words of appeasement that my mouth offers You. Every נדבה, is an expression of appeasement.