To decorate with many trinkets or small ornamental objects, often excessively.
From 'be-' plus 'trinket,' from obsolete 'trynket' of uncertain origin, possibly from Old French. This is a literary coinage suggesting excessive ornamentation.
A 'trinket' is a small, cheap ornament, and 'betrinket' perfectly captures that Victorian-era anxiety about decorating too much—it's a word that judges while it describes.
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