To declare allegiance or loyalty; to acknowledge as a liege lord (archaic legal term).
From the Old French 'alligier' meaning 'to bind,' which comes from Latin 'ligare' meaning 'to tie.' This is an archaic variant used in medieval legal language.
This is the kind of word you'd find in a 12th-century legal document—it's the verb form of allegiance, used when a vassal formally declared loyalty to their lord. It's basically a legal ceremony turned into a word!
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