From gain- + set.
gainset (third-person singular simple present gainsetteth, present participle gainsetting, simple past and past participle gainset)
- (transitive) To set over against; oppose.
- between 1305 and 1350, Richard Rolle, The Fire of Love:
- Forsooth some gainsetting say: active life is more fruitful; for it does works of mercy, it preaches and works other such deeds; [...]