悬疑的英文表达是 "suspenseful". 来源于拉丁文 "suspendere"，意为"悬挂，悬置".
例句:
The movie was suspenseful from beginning to end.
(这部电影从头到尾都充满了悬疑。)
She loves reading suspenseful novels.
(她喜欢读悬疑小说。)
The tension in the room was palpable as everyone waited for the outcome.
(大家等待结果的气氛很紧张，可以感觉到。)