內

inside / inner / internal / within / interior

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]

radical in Chinese characters (Kangxi radical 13), occurring in 用[yong4], 同[tong2], 網|网[wang3] etc, referred to as 同字框[tong2 zi4 kuang4]