ken /ken/
noun[
Date: 1500-1600;
Origin: ken 'to know, recognize' (13-21 centuries), from Old English cennan 'to make known' and Old Norse kenna 'to be aware, understand']
beyond your ken if something is beyond your ken, you have no knowledge or understanding of it:
mysteries beyond our ken [TahlilGaran] Dictionary of Contemporary English ▲