It might be argued, and argued successfully, that in dynastic China any combination of the elements「orifice, erection, tense gasps no-longer-integrated feet, with reaming rod streaming」resulted in SOMETHING SPECIAL, DISTINGUISHED, and SEPARATE from the rest, A CUT ABOVE THE OTHERS, leaving the rest behind, and so on. The two bony parts of no-longer-integrated feet (heel section, and ball of foot with toe(s) section) needed to be SEPARATED prior to use after removing the binding cloths, since the sections tended to get a bit stuck together as the sticky fluids coagulated. As depicted in erotic Chinese art, men in dynastic China masturbated by wrapping no-longer-integrated feet around an erect penis ostensibly to lower the risk of contracting a sexually transmissible disease or infection that often occurred when performing coitus within some sort of mucous membrane system of a female service provider, and, to gain hand-control over the pressure applied to the foot meat surrounding a weakened penis that functioned as a living cockring.
　Some suggest the left element perhaps is a distorted combination「orifice」with「reaming, sword」or「sword reaming orifice…」As it related to 列, a glyph that referred to EXTRA SPECIAL torture techniques of slicing off flesh from a living person, SEPARATING (this English word also means「slice off a PART with a paring knife」) a little at a time from those PARTICULARLY delicate and sensitive regions of the human anatomy as a torture or punishment, sometimes over 1,000 thin slices have been braggadociously recorded while the victim was still alive, and THAT is taking pride in your job (regardless of how cruel it may actually be). Butchers have offered special cuts of meat for thousands of years, often sliced EXTRA-thin in Asia (some talents never die).

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 leave; to depart; to separate; to distinguish; to classify; other; another; do not; must not; to pin
Japanese: distinction, difference, different, another, particular, separate, extra, exception, lord, sharing, division, draw, tie, differentiation, discrimination, to divide, to separate, to share, to distribute, to distinguish, above all, especially, particularly, all the more, nothing, separately, apart, parting, separation, farewell, branch, fork, offshoot, section, individually, to split, to part, to divide up, to classify, to sort out, to divide out, to deal out, to dish out, to discriminate, to differentiate, to break up, to mediate, to call a draw, to tie, to push one's way through, to sell, to be divided, to part from, to bid farewell, severally, other than, except for, aside from, apart from, save for
Unihan extended: separate, other; do not
EDRDG: separate; branch off; diverge; fork; another; extra; specially

Used within names (nanori)
べっ