bù不notyán言speakér而andyù喻understand
It goes without saying; self-evident; obvious.
Literal meaning
not (不) — speak (言) — and (而) — understand (喻)
Origin
A classical four-character phrase indicating something that is clear without needing to be stated.
Examples
Zhè dàolǐ bùyán'éryù.这道理不言而喻。
This principle is self-evident.
Tā de yìsi bùyán'éryù.他的意思不言而喻。
His meaning is obvious.
Usage & nuances
Used to emphasize the clarity and obviousness of something.
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