「Erect dog penis at orifice repeatedly, upward thrusting head」indicates that the dog may not have been successful in penetrating the bitch or maintaining coital status until the orgasmic release of semen, to mean UNCERTAIN, POSSIBILITY, UNSURE, a MUDDLED attempt, UNCLEAR, DOUBTFUL or results are IN DOUBT, since a dog more than all other animals should not be physically able to repeatedly penetrate a bitch's vagina. Canine males, the「dogs」are endowed with a very special penis, unlike any other penis in the animal kingdom, or any kingdom for that matter. The dog schlong is equipped with two glands located at the base of the shaft that engorge and harden upon erection, normally after penetration into the bitch's vaginal orifice. These locking bulbus glandis swell large enough to prevent the penis from being extracted from the bitch's vagina for quite some time, normally ten to fifteen minutes, give or take a few minutes, to allow the dog's semen sufficient time to get enough of a head start toward the bitch's ova that the male might actually sire some pups, rather than the next dick dog waiting to mount the same bitch in heat (this is unlike modern humans, who normally are pleased not to be slapped with a paternity suit and prefer the semen of the next dick dog that mounts a bitch in heat to fertilize the bitch's ova). Particularly among dogs and bitches that are copulating with another canid for the first time, this inability to withdraw can become quite distressing as the animals fight, howl, scream and yelp, trying all sorts of painful positions in order to liberate the dog's penis from the bitch's orifice. If the dog repeatedly penetrated the bitch's vagina, then the bulbus glandis did not lock inside the vaginal orifice, slipped from placement, and deposition of semen upon ejaculation may have occurred in much the same manner as coitus interruptus among human beings, with the spunk landing on the bitch's teats, for example.
　Scholars explain that this is an area that was supposed to be delineated using lances placed upright into soil, but some lances have either fallen over, slipped from placement, or have been moved, or removed…were soldiers that inept at stabbing the ground with spears? a slipped lance seems appropriate, however, which is to suggest that if indeed the dog's baculum/lance speared an orifice repeatedly, it may have been servicing the rectum rather than the vaginal canal as an UNSURE, a MUDDLED attempt.

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: maybe; perhaps; might; possibly; or
Japanese: a certain …, some …, or, possibly
Unihan extended: or, either, else; perhaps, maybe
EDRDG: some; one; or; possibly; a certain