Safin(讨论 | 贡献)2022年4月27日 (三) 01:38的版本 (建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=warning+etymology&newwindow=1&hl=en ref] Old English war(e)nung (see warn, -ing1). …”的新页面)
"notice beforehand of the consequences that will probably follow continuance in some particular course" [Century Dictionary], Old English warnung, verbal noun from warnian (see warn (v.)).