Or sikluwth (Eccl. 1:17) {sik-looth'}; from cakal; silliness -- folly, foolishness.
see HEBREW cakal
H5531. sikluth
שִׂכְלוּת סִכְלוּת, noun feminine folly; — ׳ס Ecclesiastes 2:3, 12, 13; 7:25; 10:1, 13; ׳שׁ 1:17 (שׂ erroneously for ס).
שִׂכְלוּת Ecclesiastes 1:17 see סִכְלוּת.