Is there a way (command etc.) to completely kill a specific process?

I want to test on the assumption that certain processes (bigd, cbrd, mcpd, scriptd, snmpd, sod, tmm, tmrouted, wccpd) have dropped on failure. (I want to capture what kind of syslog is output at this time)

Even if you kill a specific process with the kill command, the same process is restored immediately with another PID.

An example

ps aux | grep bigd

root 6456 0.0 0.0 1880 388? S 10:14 0: 00 runsv bigd

root 6479 0.0 0.3 43876 25240? S 10: 14 0: 02 bigd -S

root 19354 0.0 0.0 5568 828 ttyS 0 S + 11: 22 0: 00 grep bigd

kill 9 6456

kill 9 6479

-bash: kill: (6479) - No such process

ps aux | grep bigd

root 19392 0.0 0.0 1880 392? S 11: 24 0: 00 runsv bigd

root 19393 4.0 0.2 43736 24076? S 11:24 0:00 bigd -S

root 19469 0.0 0.0 5564 820 ttyS 0 S + 11: 24 0:00 grep bigd

Is there a way (command etc.) to completely kill a specific process?