「Deliberately out of reach and highly agitated」or「surrounded from above, within roofed pit hole」with「stench from loose and dripping stinky, penis spewing, and related feelings」as wanting access to fresh air and to open a WINDOW. Older form was (窗, 窻)「pit hole with enclosed meat.」Lower portion means「hasty, feeling agitated」as when you are not breathing a sufficient amount of fresh air, but is also a result when one's gland suddenly begins stinking and spurting gleet due to a case of gonorrhea. See related and substitute glyphs to understand the full meaning.
　「Pit hole, cavity」as holes dug into the ground or the side of a hill that were houses in the good old days (see 䆓), over「orifice」(marked on its top side) with「gushing」(悤) inside that might depict a hole back to the surface, other than the door, used as a means of VENTILATION or as a CHIMNEY to vent and funnel smoke and/or inadvertent nocturnal flatulence, or those particularly heavy, difficult to manage odors which do tend to accumulate when the ice box has no ice in August.
　Original「gushing」element (怱) may as well have been the「net, weave inside spread legs」element that describes gauze used to apply and hold poultices in place onto a diseased and stinking groin. In some fonts,「gushing chunks in crotch netting」morphed into「extremely spread feet」to suggest medical treatment or simple use of someone's crotch, or in some fonts the lower element became「supper meat.」…probably meat leftovers during the age of no refrigeration.
　After folks moved out of covered pits as a general style for housing,「stench」and「heart」were added (some scholars say) as a further reference to the「sweet smell of fresh air」but more likely just explained the need for the VENT as stemming from what those elements literally depict, a shortened and bent penis randomly flinging rancid gleet:「A much higher percentage of men with an unpleasant smell were found to have gonorrhea compared to other men, researchers from the Institute of Cytology and Genetics in Novosibirsk, Russia revealed in the Journal of Sexual Medicine. The authors explained that adult males with gonorrhea had a putrid smell, as far as many adult females were concerned.」
　　[　https://www.medicalnewstoday.com/articles/238985 2023-05-17　]　…apparently no one bothered to ask the adult males how the adult females smelled, or, none of the adult males minded or noticed the odors emitted by the adult females. Note that「frontal lobe of human brain」above「heart, penis flinging drops」is also a glyph meaning to「breathe」as a reminder to think about the consequences of spewing gleet and what effect that will have on the surrounding air quality. Associated modern meaning of SCHOOL is maybe due to「agitated, hasty」students staring out the same WINDOW of a classroom due to tedium, or more likely in the good old days describing the place where many students acquired the disease in the first place, and then congregated.

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: variant of 窗
Japanese: window, viewing through a, passing through a window, going through a window, doing through a window
Unihan extended: window
EDRDG: window; pane