invalid - incorrect, unwarranted, officially or legally unacceptable⏎
exercise - activity, keep fit, work-out, act, invoke, apply⏎
inoperative - invalid, unusable, powerless, not working⏎
furnish - supply, provide, make ready⏎
majority - largest, greatest part, main part⏎
marginally - slightly, insignificantly⏎
exorbitant - overpriced, dear, extortionate⏎
gamble - risk, speculate, uncertainty⏎
foundation - basis, source, beginning⏎
error - mistake, misjudgment⏎