Non-Sino-Vietnamese reading of Chinese 墊 (SV: điếm). Related to nệm, through an infixed form.
(classifier cái, tấm) đệm • (埶, 禫, 移, 笘, 𧛋, 𧝓)
đệm • (埶, 禫, 移, 笘, 𧛋, 𧝓)