1. warn - Verb
2. Warn - Proper noun
To refuse.
To make ware or aware; to give previous information to; to give notice to; to notify; to admonish; hence, to notify or summon by authority; as, to warn a town meeting; to warn a tenant to quit a house.
To give notice to, of approaching or probable danger or evil; to caution against anything that may prove injurious.
To ward off.
Source: Webster's dictionaryIf you deliberately plan on being less than you are capable of being, then I warn you that you'll be unhappy for the rest of your life. Abraham Maslow
I would warn you that I do not attribute to nature either beauty or deformity, order or confusion. Only in relation to our imagination can things be called beautiful or ugly, well-ordered or confused. Baruch Spinoza
When a pile of cups is tottering on the edge of the table and you warn that they will crash to the ground, in South Africa you are blamed when that happens. Desmond Tutu
If Margaret Thatcher wins on Thursday, I warn you not to be ordinary. I warn you not to be young. I warn you not to fall ill. And I warn you not to grow old. Neil Kinnock
Better warn than be warned. Walloon Proverb
Kill one to warn a hundred. Chinese Proverb