It is quite true that in future expeditions to Mars, colonists will have to ensure solar radiation if they want to have a relatively comfortable life on the surface. That excludes any contact with the outside world to a minimum of 3 meters of Martian regolith (or 20 cm of lead reinforcement, but that's a little more complicated) and therefore a window to appreciate the beautiful toxic meadows of Mars is dangerous.

Is there a way to create radiation resistant windows? If we assume that these are manufactured with silicon or some derivative, is it possible to widen the window in such a way that the radiation is dissipated considerably and still have views of the outside? Consider this window as being "Above" the underground complex.

The windows of the ISS and in general in aeronautics, the windows are designed to withstand aerodynamic pressures by dividing it into 3 layers.

The Martian regolith has a density of around 1.8 g/cm³ (Or 1800 kg/m³) while that of silicon (Basic material to create windows) is 2330 kg/m³, and if we consider that a minimum of 3 meters of regolith is required to considerably dissipate solar radiation, it would be 2.3 meters thick for a silicon window, I suppose it should be greater considering that we want to have good visibility so as not to make the window so compact (3 meters of silicon I do not think would give visibility very sharp) so we return to about 3 meters thick.