 Old Norse "kenna" (Modern Icelandic "kenna", Swedish "känna", Danish "kende", Norwegian "kjenne" or "kjenna") is cognate with Old English "cennan", Old Frisian "kenna", "kanna", Old Saxon ("ant")"kennian" (Middle Dutch and Dutch "kennen"), Old High German ("ir-", "in-", "pi-") "chennan" (Middle High German and German "kennen"), Gothic "kannjan" < Proto-Germanic *"kannjanan", originally causative of *"kunnanan" "to know (how to)", whence Modern English "can" 'to be able'.The word ultimately derives from "*ǵneh₃", the same Proto-Indo-European root that yields Modern English "know", Latin-derived terms such as "cognition" and "ignorant", and Greek "gnosis".Old Norse kennings take the form of a genitive phrase ("báru fákr" "wave's horse" = "ship" (Þorbjörn Hornklofi