cushion, mattress, bedding
褥 centers on soft, padded items for resting or sleeping: a cushion, mattress, or bedding that provides comfort and support.
褥 combines 衤 (clothing) with 辱, which likely contributes the sound. The character suggests cloth items used for lying down, such as bedding or cushions.
The clothing radical 衤 beside 辱 suggests cloth items you rest on. Picture a soft, padded mattress made of layered fabric: 褥 is your bedding.
For ジョク, imagine a joke cushion that makes a funny sound when you sit: joke -> ジョク, and the cushion is part of your bedding.
cushion; pillow; mattress
puerperium; postpartum period; postnatal period
pad placed under sheet before using a seal (to make imprint clearer)
going to bed; retiring
woman who has recently given birth
postpartum period; postnatal period; puerperal period; puerperium
puerperal fever
milk fever; parturient paresis; postparturient hypocalcemia
retiring to bed (esp. due to illness)
bedsore
puerpera; woman who has recently given birth
bedsore; pressure ulcer; pressure sore; pressure injury
straw or hay (laid out in barns for livestock)