en_tn/2ch/15/16.md

Maakah, his grandmother

This woman had been the wife of Rehoboam and the mother of Asa's father Abijah.

queen mother

This phrase is the official title of the mother or grandmother of the current king who was queen while her husband was king, but since his death has no official duties.

a disgusting figure

This phrase refers to an idol.

He cut down the disgusting figure, ground it ... and burned it

Since Asa was king, he may have told his officials to cut down the figure. Alternate translation: "He made his workers cut down the disgusting figure, grind it ... and burn it" (See: rc://en/ta/man/jit/figs-metonymy)