To bind or attach to; to connect or link something to another thing.
From Latin adlegāre or variant adligiāre (to bind to), combining ad- (to) + ligāre or legāre (to bind, tie). This appears in medieval Latin documents.
Medieval scribes used this term when literally stitching documents together or legally binding one piece to another—it's the Latin-legal version of 'attach,' and the meaning is both physical and metaphorical.
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