混入

to sneak into

confused / dirty / to mix / muddy / variant of 渾|浑[hun2]

to mix / to mingle / muddled / to drift along / to muddle along / to pass for / to get along with sb / thoughtless / reckless

to enter / to go into / to join / to become a member of / to confirm or agree with / abbr. for 入聲|入声[ru4 sheng1]