Note that Chinese sources do not list the meaning of 'brush' for this element. Variant of and related to「firmly grasping rod with stream of sticky fluid」(隶),「cavity reaming with stream of sticky fluid」(录) from a 'pig's snout' used as a euphemism for a diseased penis, and「all used up, exhausted」(盡).「Firmly grasping and scratching, scraping, inscribing while holding a rod or long object」with「two, twice, changing state」as an event that occurs AND THEN…some result, the REASON FOR [something]. Occurring AGAIN AND AGAIN as the status changes and the need arises once again. Introduces the RESULTING EFFECT OF SOME CAUSE of a prior action.
Individual elements also refer to the need for a medical procedure with a bougie to occur over and over, again and again, until either healing or death occurred. This procedure involved scratching the inner surface (「inside scripting, inscribe」) of a body part to remove scarring and decayed tissue, leaving lines, marks, and creating fluid flows in long lines resembling colored threads on surrounding cloths used to mop up the various discharges.
Furthermore, as part of a coordinated, government effort to prevent the spread of infection, official records were maintained of infected patients and treatment results. Public health laws were enforced by witchdoctor-shamans operating the brothels who knew each client (or, her girls did), with gatekeeper brute squads forcing those infected to obtain extremely painful treatments…not many folks came willingly to a bougie reaming session.
References other than from China to 'brushing, brushes' relate to stroking motions (文 holding in palm with strokes) with something held erect, rod-like, applicable to self-administering sexual release techniques employed by either sex, or both sexes for that matter: an「aw, do that again…」Sort of feeling. Nonetheless, in modern times, may also refer to the manner in which a calligraphy brush ought to be wielded,「rod in hand with lines」assuming that this element depicts only writing in some manner, by dipping the long brush into pots of sticky dark ink (mixtures of clay and burnt soot) and causing thread-like lines on cloth that resembled the squiggles of spurted discharges of blackened blood. Listed meaning of「brush」noting that brushes come in a variety of sizes, shapes, and designs for many different purposes, everything from soft hairs attached to the end of a wooden shaft dipped in black and used to apply ink, to stiff bottle brushes used to scrape, ream, and clean the insides of a vessel or shaft…perhaps, a BRUSH WITH DEATH in the pre-antibiotic old days. Formerly, people had no paper to write upon, and wrote by scratching or stroking again and again the inner surface of dry skins, cloth, flat bones, or clay tablets in the shapes of glyphs, or by scratching the inner surface of cut bamboo slats with a stiff brush dipped in ink, or some similar method.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: (arch. introductory particle); then; and then
Japanese EDRDG: brush, finally, self, relate, follow, here, fast
Unihan extended: writing brush, pencil; thereupon