Why this word is great
VICISSITY — [Noun] A change, especially in fortune or circumstances. From Latin vicissitas ("change, alternation"), derived from vicis ("turn, alternation") + -ity (noun-forming suffix). Unlike "vicissitude" (which suggests a rhythmic, cyclical ebb and flow) or "fluctuation" (which implies minor, back-and-forth adjustments), "vicissity" is the quiet, unannounced pivot—the moment when the wind shifts direction without warning, when a stranger’s glance alters the course of a life, or when a single letter in a word changes its meaning entirely. It is the silent hinge on which fate turns, neither cruel nor kind, simply indifferent.