otiose Antonyms

useful on the pig's back vivacious valuable tireless successful studious sleeved sedulous productive practical potent worthwhile zealous financially manageable workaholic performant lean and mean overactive hardworking hard-working unflagging meaningful activated untiring persevering painstaking necessary effectual effective driven diligent conscientious concerned careful caring busy attentive assiduous efficacious efficient lively keen judicious interested industrious indefatigable fruitful fresh essential