Provided is often used in the context of giving or supplying something, so antonyms for this word would be related to taking away or withholding something. Some possible antonyms for provided in this context include: denied, deprived, removed, prohibited, restricted, disallowed, prevented, and hindered. These words imply a sense of refusal or restriction, rather than the act of giving. Another set of antonyms for provided could be those implying a lack of guarantee or assurance, such as uncertain, unpredictable, doubtful, unreliable, or insecure. These words describe situations where something cannot be relied upon or expected, as opposed to the sense of security and assurance that the word provided often conveys.