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in • sip • id adj., not exciting or interesting. We left the theater in the middle of the insipid movie because we were bored.

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dif • fu • sive adj., causing diffusion or scattering. One of the science fair projects demonstrates the diffusive qualities of the prism.

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de • barred part., kept from some right or privilege; excluded. All reporters have been debarred from the courtroom.

re • tired adj., withdrawn or apart from; secluded. The hermit lives a retired existence in a remote mountain cabin.