After decades of experience I learned to use ctrl-\ (break) or ctrl-z and then kill -9 %1. Hope this helps someone.
[2]+ Stopped units
it's %2. But it's also %+, %%, and just %, which is what the "+" after the [2] means. In my case %1 is evince zhegalkin-sm7433.pdf (Running, not Stopped), which I definitely do not want to kill.Plenty of people open a new terminal window for every new program they want to run, but I commonly have several "jobs" in the same window, stopped or even running. Less often now that monitors are bigger, but still.
* https://www.mit.edu/people/dpolicar/writing/prose/text/think...
(For those who don't know "kill KILL" is equivalent to "kill -9". And despite the name "kill" is a tool for sending signals to processes.)
" "kill INT %1" and then "kill TERM %1" before "kill KILL %1". "
is good advice as progressive measures