A CALYX is formed by a thin outer layer of tissue surrounding and protecting a flower bud before it blooms, when NOT YET OPENED. Apparently this glyph was selected to represent the meaning of「not」as in「not yet a real flower」while still only a bud, BUDDING. Perhaps the elements are「array of heads flaccid, not blooming or emerging」again as something NOT happening.
　'Unopened flowers' still covered by the tissue of a「CALYX」was a term used to describe purchases of virginal harem members who were preparing for de-flower-ing. Young virginal female sex slaves were bought and sold regularly in the past (today, too, for that matter), particularly in China:
　「Viewing women as commodities [see 品] was also made customary from Song Dynasty (960 - 1279) forward, both in the suddenly expanded labor market and within relationships. Men could sell their female kin to slavery or prostitution, and frequently did.」
　　[　https://www.zum.de/whkmla/sp/0910/hersheys/hersheys5.html 2011-04-05　]　
　「Bound feet were a mark of beauty…. Women, their families, and their husbands took great pride in tiny feet, with the ideal length, called the 'Golden Lotus,' being about 7 cm (2.75 inches) long. …The process was started before the arch of the foot had a chance to develop fully, usually between the ages of 2 and 5.」
　　[　https://en.wikipedia.org/wiki/Foot_binding 2012-12-17　]　
　「In traditional Chinese medicine, there has never been a mental disease called pedophilia (or an equivalent term), or homosexuality, or most of the other so-called sexual variations for that matter. …Children are usually described as natural sexual beings and erotic stimulation and sex-play are seen as beneficial to their healthy development.」
　　[　https://docx2.com/wp-content/uploads/Are-Any-of-the-Pharaphilias-in-DSM-Mental-Disorders_.pdf 2023-05-14　]　
　A CALYX may also have referred to the tougher skin of the sole of a foot that was no-longer-integrated BADLY, CLUMSY, CLUMSILY, A BAD JOB, with calyx being a failed attempt to become a flower. The no-longer-integrated feet needed to appear as symmetrical as possible, or else the client had the perpetual feeling he was masturbating with something deformed, literally, a「monster」(with that shoe actually being on the other foot, so to speak)…「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　]　
　Without a doubt, the Irish also have knowledge of their own to pass along in these trying times:「Masturbation will not spread coronavirus, especially if you wash your hands (and any sex toys) with soap and water for at least 20 seconds before and after.」Nonetheless and regrettably, unlike in dynastic China, it must be undertaken alone to truly be a preventative countermeasure but still achieve the desired result with some degree of safety.
　 　[　https://www.sexualwellbeing.ie/sexual-health/sex-and-coronavirus/ 2020-03-31　]　
　The Dutch, too have the same solution—it seems masturbation has become mainstream in the media the world over due to the coronavirus (it has always been 'the main stream' in reality, albeit covertly for most folks):
　「'Don't have sex with your partner if they have been isolated because of (suspected) coronavirus infection,' the RVIM says. 'Sex with yourself or with others at a distance is possible (think of telling erotic stories, masturbating together).'」
　　[　https://www.theguardian.com/world/2020/may/15/dutch-official-advice-to-single-people-find-a-sex-buddy-for-lockdown-coronavirus 2020-05-16　]　
　Needless to point out perhaps, but Chinese shamans from antiquity hit upon the same solution as a pandemic preventative countermeasure, honed for ultimate client satisfaction by utilizing naked females with no-longer-integrated feet as masturbatory sex buddies available for short-term rental with erotic visualization of live prepubescent female genitalia engaging in autoerotic stimulation herself, as a solution to the same problem facing us now, but in pre-Internet days.

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: (negative prefix); not; no
Japanese: un-, non-, negative prefix, bad …, poor …, unevenness, irregularity, lack of uniformity
Unihan extended: no, not; un-; negative prefix
EDRDG: negative; non-; bad; ugly; clumsy