Forfending means to prevent or protect against something, typically something harmful or unwanted. Antonyms for forfending include allowing, permitting, encouraging, promoting, facilitating and fostering. To allow something means to let it occur without hindrance or resistance. To permit something means to give permission for it to happen. To encourage something means to inspire or stimulate someone to act or behave a certain way. To promote something means to advance or escalate its development or growth. To facilitate something means to make it easier or more achievable, and to foster something means to nurture or promote its growth or development.