From a <span class="searchmatch">Proto</span>-Indo-European *rek-, with the following proposed cognates: Per Vasmer, cognate with Lithuanian <span class="searchmatch">rẽkti</span> (“to shout, to roar”), 1sg. rėkiù, Lithuanian...
Lithuanian <span class="searchmatch">rė̃kti</span> (“to shout, to roar”), Latvian rèkt (“to shout, to roar, to howl”). *rokotъ m murmur, roar * -ъmь in North <span class="searchmatch">Slavic</span>, -omь in South <span class="searchmatch">Slavic</span>. East...