'permanently-allowed' originates from Latin and Old French, specifically the words 'permanere' (Latin) and 'alouer' (Old French); 'permanere' contained the elements 'per-' meaning 'through, completely' and 'manere' meaning 'to remain', while 'alouer' is ultimately related to Latin 'ad-' + 'laudare' where 'laudare' meant 'to praise/approve'.

'permanently-allowed' is a modern compound formed from 'permanent' (from Latin 'permanens' → Old French/Medieval Latin → Middle English 'permanent') and 'allow' (from Old French 'alouer' → Middle English 'allowen' → modern English 'allow'), combined into the adjectival phrase 'permanently allowed' and sometimes hyphenated.

Originally, 'permanere' referred to 'remaining through/continuing' and 'alouer' (from 'laudare') was associated with 'praise/approval'; over time these developed into meanings 'lasting/lastingly' and 'to permit/approve', so the compound now conveys 'approved/ permitted to continue indefinitely'.