[Elements vary by font] a MOUNTAIN PASS functions as the unavoidable ONLY WAY to proceed, and a CONNECTION from one side to the other, the valley between two high mounds, a crossing within a mountain range. A low point, valley-shaped PASSAGEWAY BETWEEN MOUNTAINS (see 山), crossing the line into a FRONTIER, new and unexplored territory, a leading edge, or a gateway to one's neighbor. A「big rod emission」will SHUT THE FLOW, CLOSE one's position, at least until refractory has lapsed. Passing a rod in reciprocal motions into any valley-shaped area of a person normally creates a CONNECTION and various legitimate CONCERNS. All element combinations suggestive of new sexual experiences of one sort or another.
　Glyphs having identical meanings (関, 關) apparently with equivalent internal elements may tell the story best.「Emissions」with the original form of「heaven」(middle stroke is wider than the top stroke) within a「gateway, methodology, the teachings of a master, classifier for large blasts」(門). Older version uses「multiple loose dripping emissions」(幺) with「divine diva, hair-raising experiences, raised rods」within the「gateway」as something TO BE CONCERNED ABOUT. Indicates a CONNECTION, being INVOLVED, NOT GOING BACK to the way it was before. Older glyphs lead to the conclusion that the glyph represents「heaven's gate.」
　Original element of「methods of many loose and dripping emissions with prepubescent divine female (關)」indicate pedophilia and NO TURNING BACK, NO GOING BACK to 'the way we were.' Etymology in English of「pedo, paedo」from Latin and/or Greek refer to one or all of「young and small child」「feet」「feces and flatulence, anal emissions.」…all just coincidences? maybe.
　Some traditional fonts display 关 as「arrow, sick penis」(矢) with「taut, and the other side, too」at the top-right, suggesting that if one is struck on both sides by an arrow, or multiple infections and illness, the predictable result will be certain death and a one-way pass into heaven, checking in but unable to check out as it were. It ought to be pointed out that limpness is not normally considered to be a male virtue.
　Scholars explain these elements as treadles that are actuated by thrusting downward with one's feet on one side of a loom and then the other side, too…what do you think about that?

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: mountain pass; to close; to shut; to turn off; to concern; to involve
Unihan extended: frontier pass; close; relation
EDRDG: frontier pass; close; relation