[Elements vary by font] REGRET and REMORSE, MORTIFICATION and FEELING BITTER ABOUT an action, namely「rod emissions difficult to forget on both sides and rod head sliding with penetration perforating no-longer-integrated foot」that was extremely soft due to suppurative gangrene…see the inner element 毋 for details. MORTIFICATION refers to the death or decay of living tissue and gangrene, in addition to a feeling of loss of prestige or self-respect, the humiliation of perforating a putrid foot with one's penile shaft while masturbating with it wrapped around one's glans.
　no-longer-integrated feet:
　「…[T]he custom of applying painfully tight binding to the feet of young girls to prevent further growth. …The tightness of the binding meant that the circulation in the feet was faulty, and the circulation to the toes was almost cut off, so any injuries to the toes were unlikely to heal and were likely to gradually worsen and lead to infected toes and rotting flesh. If the infection in the feet and toes entered the bones, it could cause them to soften, which could result in toes dropping off. Although, this was seen as a benefit because the feet could then be bound even more tightly. Girls whose toes were more fleshy would sometimes have shards of glass or pieces of broken tiles inserted within the binding next to her feet and between her toes to cause injury and introduce infection deliberately. Disease inevitably followed infection, meaning that death from septic shock could result from foot-binding, and a surviving girl was more at risk for medical problems as she grew older. …Bound feet were once considered intensely erotic in Chinese culture…. Qing Dynasty sex manuals listed 48 different ways of playing with women's bound feet.」
　　[　https://en.wikipedia.org/wiki/Foot_binding 2012-12-17　]　
　Suggested as the deep MOURNFUL「feeling」you have when your「mother is laid out prone」very ill, or on her deathbed, or after she has died, perhaps of REGRET and feeling of not having done enough while she was alive…meanings associated with illness and death apparently added by the Japanese. REMORSE and VEXING formerly, all sorts of meanings associated with REGRET, REPENTANCE for actions done related to schtupping (ejaculation into a birth canal or other attainable orifice) one's own mother—see 侮 that describes the insult 'motherfucker.' Note this glyph is drawn with nine strokes in Japanese, but ten in Chinese due to variation in the choice of the inner elements.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: to regret
Japanese: regret, repentance, condolence, condolences, to mourn, to lament, to be sorry, to regret, to repent, vexing, annoying, frustrating, regrettable, mortifying, chagrin, bitterness, frustration, vexation, mortification, to feel bitter, to be vexed, to resent
Unihan extended: repent, show remorse, regret
EDRDG: repent; regret