The quality of being loyal or the state of owing allegiance to someone or something.
From 'allegiance' with the suffix '-cy' (from Latin '-cia'), which creates abstract nouns describing qualities or states. This is a less common variant of 'allegiance.'
While 'allegiancy' is rarely used today, it's a fascinating example of how English can stack suffixes—'allege' → 'allegiance' → 'allegiancy'—to express increasingly abstract concepts of loyalty.
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