Origin: before 900; Middle English kennen to make known, see, know, Old English cennan to make known, declare; cognate with Old Norse kenna,German kennen; akin to can1
"to know," Scot. dial., from O.E. cennan "make known, declare, acknowledge," originally "make to know," causative of cunnan "to become acquainted with, to know" (see can (v.)). The noun meaning "range of sight" (1590) is a nautical abbreviation of kenning.
/ken/ 1. Ken Thompson 2. A flaming user. This was originated by the Software Support group at Symbolics because the two greatest flamers in the user community were both named Ken. [Jargon File]