From Jier + -elk. Compare English yearly. <span class="searchmatch">jierelk</span> yearly; annual <span class="searchmatch">jierelks</span>...
From <span class="searchmatch">jierelk</span> + -s. <span class="searchmatch">jierelks</span> yearly; annually <span class="searchmatch">jierelk</span>...
Frisian terms suffixed with -elk aastelk döödelk eendelk eerelk fjuntelk früntelk gefoarelk hatelk <span class="searchmatch">jierelk</span> moanskelk muugelk stärfelk tiedelk äänelk...
(adverbial suffix). Cognate with Scots yerelie (“yearly”), Saterland Frisian <span class="searchmatch">jierelk</span> (“yearly”), West Frisian jierliks (“yearly”), Dutch jaarlijks (“yearly”)...