Why this word is great
LIMEN — [Noun] A liminal point; the threshold of a physiological or psychological response. Learned borrowing from Latin līmen ("threshold"), it is the precise moment of transition—the point where warmth becomes heat, silence becomes sound, or darkness becomes light. Unlike "threshold" (which broadly marks any entry) or "boundary" (a stark division), "limen" is the scientist’s whisper of change: the exact decibel at which a sound becomes audible, the faintest trace of bitterness detectable on the tongue, or the precise point where pressure turns to pain. It is the edge of perception, where the world flickers into being—proof that awareness, too, has its own quiet geography.