Being「rowdy with juxtaposed orifices and female-female deceitful behavior」in「not at full potential, fail (with the lord) deficient, long time in tension, fortunately avoiding worse conditions, luckily discovering a solution.」Old glyphs indicate many open mouths (more than two) that are surrounding someone OUTSPOKEN and YELLING, likely making ACCUSATIONS. Replacement glyph (㖾) is 'rowdy and disobedient.' Based upon pronunciation alone, STARTLE seems to be the original or prevalent Japanese understanding, as if someone suddenly yelled or a tiger roared and the noise STARTLED others, causing their mouths to open as the jaw drops in surprise.
Seems to mean「yelling loudly, mouth with array of tense gasping」but with many orifices and lots of noise, excitement, hooting and hollering while the crowd are all DRUMMING their two orifices, the box, the hollow spot, the wetlands, and so on, damaging the harem as the eunuchs lost control, a session much more enjoyable than being with the lord: multiple orifices rowdy and all getting lucky as AN INCESSANT DRUMMING SOUND.
Some of the favorite positions used by a client with a service provider's set of no-longer-integrated feet involved placing the two surrogate foot orifices in a juxtaposed position, that frankly highly resembled a buttocks-anus combo, and then using the two feet to squeeze his appendage spewing venom, masturbating into that juxtaposed set of surrogate orifices whilst gazing down at the naked female's actual crotch and torso (her hands were likely also busy performing, with the hope of encouraging a rapid client climax and then moving on to the next-in-line):
「Qing Dynasty sex manuals listed 48 different ways of playing with women's [no-longer-integrated] bound feet」(after removing the binding cloths, of course)
[ https://en.wikipedia.org/wiki/Foot_binding 2012-12-17 ]…48 ways.
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.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: beat a drum; startle
Japanese EDRDG: outspokenly
Unihan extended: sound; drumming