Synonym: advise, alert, caution, forebode, give notice, inform, menace, notify, threaten. Similar words: warning, early warning, barn, learn, earnings, learn from, war, at war. Meaning: [wɔrn /wɔːn] 
v. 1. notify of danger, potential harm, or risk 2. admonish or counsel in terms of someone's behavior 3. ask to go away 4. notify, usually in advance.
v. 1. notify of danger, potential harm, or risk 2. admonish or counsel in terms of someone's behavior 3. ask to go away 4. notify, usually in advance. 
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181 Even so, you'veprobably also run up against people who love your idealism, but warn you tolower your sights, to scale back your ambitions a bit, to settle for somethingless.
182 Webb and Kench warn that while the islands are coping for now, any acceleration in the rate of sea-level rise could overtake the sediment build up.
183 The solution: Make an Ajax call in the background to a server-side checking routine; if there are errors, warn the user, highlight incorrect fields, and so on.
184 Sunscreen may do more harm than good if it is not used properly , researchers warn yesterday.
More similar words: warning, early warning, barn, learn, earnings, learn from, war, at war, award, warm up, toward, warmth, post-war, software, warrior, warehouse, hardware, be aware of, awareness, put forward, afterward, bring forward, look forward to, upwardly mobile.