suspend
tcsh shell: suspend
suspend is an alias for stop $$, where stop is an alias of kill –STOP and $$ expands to the current process of the shell. suspend sends a SIGSTOP to the current shell.
See kill — End a process or job, or send it a signal for more information.
In the tcsch shell, suspend causes the tcsh shell to stop in its tracks, much as if it had been sent a stop signal with ^Z. See tcsh — Invoke a C shell.
kill, sh, tcsh