A toothless person, likely a skilled and experienced concubine or service provider who is perhaps now old and「not engaging in other forms of intercourse」using her GUMS as「head downward thrusting to one side and then the other side, too」with「loosened, pulling toward the face」giving STILL MORE as a service provider…「pulling vertically on the client's weapon, dart, arrow」with strong sucking motions, and gentle GUM work.
　One's「dirk, arrow-like shaft」that is「pulled toward face, arched and vertically erect」suggests a closer inspection prior to engagement with one's MOUTH GUMS, to wit: QUESTIONING, IN QUESTION, INTERROGATORY, and MORE TO COME naturally, all concepts not covered too well by the simple「arrow pulled, bow vertical」meaning of these elements. See 訠,「intercourse with pulled toward face.」
　Seemingly describes the general location on an arrow where one pulls back, the FLETCHING, as「arrow, pull toward face」—yet actually, most archers place fingers above and below without pulling or grasping any part of an arrow at all, leastwise the fletching feathers, instead pulling back on the bowstring since doing so allows for greater control. It might be imagined that the nock of an arrow located behind the fletching also resembles a set of「toothless gums」surrounding the bowstring,「in and out in high tension for a long time with gasping.」To fletch means adding feathers to an arrow, and not discharging or using the arrow yet. The purpose of adding feathers to a shaft is for guiding the motion into a straight path as the shaft moves…adding a feathering touch as TOOTH GUMS clearly reflects the meaning of a shaft moving within a mouth with the motions guided by the gums. See the related glyph 'intercourse, pulling toward face' (訠).

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: (interrog.)
Japanese: to fletch
Unihan extended: much more, still more; the gums
EDRDG: feather (arrow)