The word "in-feasible" refers to something that is not possible, practical, or capable of being accomplished. The antonyms for this word include feasible, practical, possible, workable, attainable, viable, achievable, and manageable. Feasible refers to something that can easily be done or accomplished without much difficulty. Practical implies something that makes sense in a realistic, down-to-earth way. Possible refers to something that can be achieved with effort and determination. Workable suggests something that can be achieved through careful planning and execution. Attainable implies something that can be acquired or achieved over time. Viable implies something that is workable or able to succeed in the long run. Achievable suggests something that can be accomplished with hard work and persistence. Manageable implies something that can be controlled or handled easily.