Correct

冷不丁

/ lěngbudīng /
Strokes

Definition

suddenly/by surprise

Example

As an Adverb

suddenly; unexpectedly; without warning; by surprise

1
míng
nán
男子
lěngbudīng
冷不丁
le
shǒu
棘手
de
wèn
问题
,
lòng
de
yǎnjiǎngzhě
演讲者
bànshǎng
半晌
yánduì
无言以对

A man raised a thorny question unexpectedly, rendering the speaker speechless for quite a while.