French is even weirder with “sentir”.
For feelings, french usually uses a reflexive form: “je me sens triste” (I feel sad). That’s the easy part.
Now the real fun is that you can say stuff like “je sens tes pieds”, and it could mean “I can feel (touch) your feet” or “I can smell your feet”, or even both at the same time.
Think of the OS as a sum of hundreds of components. You have a kernel, a boot manager, a boot and service manager system, a shell, some command line utils, drivers, a display server, a graphical interface, a sound server etc.
On a classical OS, all these components are distributed individually as packages. Which means that there is a risk of failure at any update: discrepancies on dependencies or compiler versions, failed updates, power outages etc.
“Immutable”, also called “atomic” or “transactional” OSs, distribute the whole stack as a single image. If it reminds you of Docker, that’s because it’s exactly the same thing. An update can’t fail. It’s either fully applied or not at all. And that’s because it’s not an update at all, it’s a complete system image deployed alongside the one currently in use. If it doesn’t work, you can simply “downgrade” by selecting the previous image.