Unweight is a term used to refer to the reduction of weight on something or someone. There are a number of synonyms that can be used in its place to provide more variety and depth to your writing. Some of these potential synonyms include phrases like "reduce the load" or "lighten the burden", which imply a conscious effort to make a situation easier or more comfortable. Other options might include terms like "unburden" or "unencumber", which suggest a release from a heavy or oppressive weight. Ultimately, the right choice will depend on the context of your writing and the tone you want to convey, but these options provide a solid starting point.