The teacher is completely discomfit by the unexpected question.是什么意思？

The teacher is completely discomfit by the unexpected question.

老师被那意外的问题完全扰乱(楞住了).

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

teacher

n. 教师，教员，老师，先生，[航]教练机；

例句
He was now a teacher and a respectable member of the community.
他现在是一位教师，并且是社区内受人尊敬的一员。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

completely

adv. 完全地，完整地，完全，彻底，全部，一干二净，很，非常，充分，十分，万分；

例句
...a second career which absorbed her more completely than her acting ever had.
比演艺生涯更让她投入的又一职业

discomfit

vt. 使为难，使狼狈，使挫折，挫败；

例句
The teacher is completely discomfit by the unexpected question.
老师被那意外的问题完全扰乱(楞住了).

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

unexpected

adj. 想不到的，料不到的，意外的，忽然的，突然的；

例句
'You won't get away with this,' he said with unexpected bravado.
“这事你休想就这么过去，”他以出人意料的强横语气说道。

question

n. 问题，疑问，怀疑，议题；vt. 问（某人）问题，对（某事物）表示[感到]怀疑；

例句
...certain assumptions which are accepted without question as absolute truths.
某些未经质疑就被作为绝对真理而全盘接受的假设