To encircle or secure something with a belt, rope, or band, or to prepare or strengthen oneself mentally for something difficult.
From Old English 'gyrdan,' related to Gothic 'gastaujan,' ultimately from Proto-Germanic roots meaning to encircle; extended metaphorically to mean prepare or fortify.
The phrase 'gird your loins' comes from the biblical and ancient practice of lifting robes and securing them with a belt before running or fighting—the word itself captures how preparation and strengthening are about gathering your resources.
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