peremptory

形容词 peremptory:

1. offensively self-assured or given to exercising usually unwarranted power
   同义词：autocratic, bossy, dominating, high-and-mighty, magisterial
2. not allowing contradiction or refusal
3. putting an end to all debate or action

1. The teacher spoke in a peremptory tone.
   老师以命令的口吻说话
2. His peremptory tone irritated everybody.
   他那专横的口气激怒了大家。
3. He made a peremptory order.
   他下达了一个必须服从的命令。

per.emp.to.ry

adj.（形容词）
Putting an end to all debate or action:
断然中止：停止所有的辩论或活动：
例句：
a peremptory decree.
中止政令

Not allowing contradiction or refusal; imperative:
不容许反驳或拒绝的；不可侵犯的：
例句：
The officer issued peremptory commands.
军官发出了不容许辩驳的命令

Having the nature of or expressing a command; urgent:
强求或命令的；紧急的：有下命令的天性的；急切要求的：
例句：
The teacher spoke in a peremptory tone.
老师以命令的口吻说话

Offensively self-assured; dictatorial:
过度自信的；专制的：
例句：
a swaggering, peremptory manner.
狂妄自大、过于自信的举止

来源：
Latin peremptôrius
拉丁语 peremptôrius
from peremptus [past participle of] perimere [to take away]
源自 peremptus [] perimere的过去分词 [拿走]
per- [per-]
per- [前缀，表.遍及.]
emere [to obtain] * see em-
emere [获得] *参见 em-

【引伸】
peremp.torily
adv.（副词）
peremp.toriness
n.（名词）