The phrase "begs off" typically means to decline or excuse oneself from a task, responsibility, or invitation. Some antonyms for this action could be accepting, agreeing, or committing. Other words that express the opposite of begging off could be volunteering, offering, or agreeing to participate. When someone begs off, they may provide a reason or excuse for their inability to participate, and antonyms for that justification could include certainty, willingness, or eagerness. Ultimately, the opposite action of begging off involves actively engaging in a task or event, showing enthusiasm and a commitment to follow through.