Fits out means to equip or furnish something with what is necessary. Its antonyms would be words that signify the opposite, that is, to de-equip or strip something of what it already has. These words are dispossess, divest, disrobe, denude, and strip. Dispossess refers to forcing someone out of their property or possessions, while divest means to strip something of its ownership or rights. Disrobe and denude both mean to undress or uncover something, and strip refers to taking away or removing something essential to it. All these words are antonyms of fits out, and each represents a different degree of removal or deprivation of what is necessary.