This subshell reinitializes itself, so that the effect is as if a new shell had been invoked to interpret the script, with the exception that the locations of commands remembered by the parent (see the description of hash in Bourne Shell Builtins) are retained by the child.
Nke a subshell megharịrị onwe ya, nke mere na mmetụta dị ka ọ bụrụ na a kpọbatara ọkpụkpụ ọhụrụ iji mee ihe ederede ahụ, ma e wezụga na ọnọdụ nke iwu ndị nne na nna chetara (lee ihe n'okpuru n'okpuru SHELL BUILTIN COMMANDS) ka nwatakịrị ahụ nọ.