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Does One word of advice mean one advice?
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One word of advice is seldom limited to one word.
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Advice isn't countable, so you can't have "one advice."

It sort of means "What I"m about to tell you is so basic and obvious, I can sum it up with one word."

That word might be "don't" (as in "don't do what you're thinking about doing) or "leave!" or even "run!"
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Comments  
Grammar GeekAdvice isn't countable, so you can't have "one advice."
That's strange. In my language it is.
Anyway, thanks, Barbara!
 Philip's reply was promoted to an answer.
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You can say "Let me give you a piece of advice" but not "Let me give you an advice" and not "Thanks for the advices."
Thanks for the brief! Really useful.Emotion: smile

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