The act of drawing near or approaching something; a moving closer.
From Medieval Latin 'appropinquatio,' formed from 'appropinquare' (to draw near) + the noun suffix '-tion.' A formal noun for the action of approaching.
This word is so rare and archaic that it's basically gone from English, but it shows how the Latin root 'propinquus' (near) gave us both 'propinquity' and 'appropriation'!
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