tat -- his (Banasura's); mata -- mother; kotara nama -- named Kotara; nagna -- naked; mukta -- loosened; sirah-ruha -- her hair; purah -- in front; avatasthe -- stood; krishnasya -- of Krishna; putra -- her son's; prana -- life; rirakshaya -- hoping to save.

Just then Banasura's mother, Kotara, desiring to save her son's life, appeared before Lord Krishna naked and with her hair undone.