Possibly from Proto-Slavic *četina. <span class="searchmatch">чѐкиња</span> f (Latin spelling čèkinja) bristle...
*četina. First attested in the 19th century. čèkinja f (Cyrillic spelling <span class="searchmatch">чѐкиња</span>) bristle ^ Matasović, Ranko (2016) “čekinja”, in Dunja Brozović Rončević...