About
The character '厣', denoting an operculum or protective cover in biological contexts, is the simplified counterpart of the traditional form '厴'. Its structure in both versions incorporates the '厂' radical, which can imply a covering or enclosure, combined with a phonetic component: the traditional character uses '厭' (yàn), while the simplified form uses '厌', the reduced version of that component. The character's etymology relies on this phonetic borrowing from '厭', a character associated with pressing down or suppression, a concept aligned with the function of a lid. This specialized meaning has consistently referred to anatomical or biological coverings without significant semantic shift.