zhǔ dòng
to take the initiative
to do sth of one's own accord
spontaneous
active
opposite: passive 被動|被动[bei4 dong4]
drive (of gears and shafts etc)
Dōng dong
Dongdong, cheerleading mascot of 2008 Beijing Olympics
Zhú dōng
Zhudong or Chutung town in Hsinchu County 新竹縣|新竹县[Xin1 zhu2 Xian4], northwest Taiwan