From over- + keen. <span class="searchmatch">overkeen</span> (not comparable) Overly keen. over eager overknee...
From over- + knee. overknee (not comparable) Reaching above the knee. overknee waders; overknee boots <span class="searchmatch">overkeen</span>...
keen as knives keen as mustard keenly keenness keeno keen on keen-witted <span class="searchmatch">overkeen</span> peachy keen peachy keen jelly bean treat 'em mean to keep 'em keen unkeen...