ㄉㄨˊㄉㄨㄢˋduàn

  1. 自己主見決斷事情管子·》:獨斷營壘。」韓非子·孤憤》:大臣執柄獨斷人主不明。」專斷籌商

to decide alone without consultation, arbitrary, dictatorial
arbitraire