mou4 dyun1 dyun1無端端无端端
Jyutpingmou4 dyun1 dyun1
Yalemòuh dyūn dyūn
Definition
For no reason, or all of a sudden without any sign or warning.
colloquialdescriptionsdaily actions
How it's used
Expresses a sense of bewilderment or annoyance regarding an action that lacks a clear cause or warning. It is frequently used in questions to challenge someone's sudden change in behavior or an unexpected event. Unlike the more neutral 突然, this term carries a stronger implication that the action is irrational or uncalled for.
Examples
He lost his temper for no reason and scared me.
Why did you buy so much stuff and bring it home all of a sudden?
Related words
Common phrases
to get angry for no reason
to laugh for no reason
Common mistake
Do not confuse this with 突然, which is a neutral descriptor for timing. Using 無端端 often adds a layer of judgment or frustration, so it is inappropriate when describing a sudden but logical event, such as a sudden rain shower or a sudden change in plans.
Grammar color guide
Noun
Verb
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Particle
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Grammar guides
- Directional complementsThe small words added after a verb to show direction of movement, like up, down, out, in, and back. Common in everyday Cantonese.
- DemonstrativesThis and that with 呢 and 嗰, the personal pronouns, and how 哋 turns I, you, and he into we, you all, and they.
- Resultative complementsSticking a result word onto a verb to show how it turned out, like eat until full or look and find. A productive everyday pattern.



