dictionary of <span class="searchmatch">Slavic</span> languages] (in Russian), numbers 11 (*konьcь – *kotьna(ja)), Moscow: Nauka, page 18: “*<span class="searchmatch">kopti</span>... презенс на -je- ― *<span class="searchmatch">kopti</span>... prezens...
Possibly borrowed from <span class="searchmatch">Proto</span>-Baltic [Term?] (whence Latvian kāpt, Lithuanian <span class="searchmatch">kopti</span>), or derived from *kapu (“stick, rung”). *kabut'ak (stem *kapuda-)...
from <span class="searchmatch">Proto</span>-Baltic [Term?] (whence Latvian kāpt, Lithuanian <span class="searchmatch">kopti</span>), or alternatively, derived from unattested noun *koopa (“hoof”), borrowed from <span class="searchmatch">Proto</span>-Germanic...