How to say 'never' in Mandarin Chinese?
There is seldom a one-on-one word translation that will work in all contexts. "从来没有 | cónglái méiyǒu" or "从来没 | cónglái méi" works if you're talking about something that has never happened up to the present time.

我从来没学过中文. (Wǒ cónglái méi xuéguò Zhōngwén - I have never learned Chinese.)

If you want to talk about the future, as in "something will never happen", you need a different expression altogether. 

他永远不会来. (Tā yǒngyuǎn bù huì lái - He will never come.)

So, my suggestion is, if you're looking for a word meaning, at least provide a context.