无疑 (wú yí) — "undoubtedly"
Reach for 无疑 when you want to deliver a verdict in writing — 'no doubt,' 'unquestionably' — and have it land with editorial weight. It's a two-character literary adverb you'll see in news commentary, analysis pieces, and formal opinion writing. Drop it in front of the verb or judgment to mark the claim as something the writer treats as settled. Spoken conversation rarely uses it; this is a register choice signaling 'I'm being serious.'
Structure
[SUBJECT] 无疑 [VERB/JUDGMENT]
wúyí
How to Think About It
无疑 is the writer stamping a claim with their authority — it does NOT prove the claim, it asserts that no further doubt is welcome. Compare to English 'undoubtedly': you'd put it in an opinion column, not in a friendly text. In Chinese, 无疑 lives in the same register as 显然 and 必然, and clashes with casual particles like 吧 or 呢.
Examples
这一决定无疑会影响整个行业。
Zhè yī juédìng wúyí huì yǐngxiǎng zhěnggè hángyè.
This decision will undoubtedly affect the entire industry.
他无疑是今年最受欢迎的歌手。
Tā wúyí shì jīnnián zuì shòu huānyíng de gēshǒu.
He is undoubtedly this year's most popular singer.
新政策无疑给小企业带来了压力。
Xīn zhèngcè wúyí gěi xiǎo qǐyè dài lái le yālì.
The new policy has undoubtedly put pressure on small businesses.
Common Mistake
Learners use 无疑 in spoken Chinese to mean 'definitely,' which sounds bookish and stiff. In speech, native speakers say 肯定, 一定, or 绝对; 无疑 belongs in essays and analytical writing.
我无疑会去你的生日聚会。
我一定会去你的生日聚会。
Don't Confuse With
肯定
The spoken equivalent — 'definitely / for sure.' Use 肯定 in conversation and texts; reserve 无疑 for written analysis.
显然
'Obviously / evidently' — presents the judgment as visible to anyone. 显然 invites the reader to see; 无疑 declares that the writer has already decided.
毫无疑问
Same meaning, fuller form ('without any doubt') and slightly more emphatic. Often starts a sentence: '毫无疑问, ...' 无疑 sits closer to the verb.
Practice
这场比赛 ___ 是本赛季最精彩的一场。
Show answer
无疑
他的演讲 ___ 打动了在场的每一个人。
Show answer
无疑
Put in order: [无疑 / 这部电影 / 一部 / 是 / 杰作]
Show answer
这部电影无疑是一部杰作。
Translate to Chinese (formal register): 'The data undoubtedly supports this conclusion.'
Show answer
这些数据无疑支持这个结论。
Write one analytical-style sentence using 无疑 to deliver a verdict on a current trend.
Show answer
Example answer: 人工智能的发展无疑改变了我们的工作方式。 (The development of AI has undoubtedly changed the way we work.)
Hear It in Real Episodes
This pattern appears in 1 Fluentide episode: