'temporarily-allowed' is a compound formed from 'temporarily' and 'allowed'. 'Temporarily' originates from Latin, specifically the word 'temporarius', where the root 'tempus' meant 'time'. 'Allowed' originates from Old English/Old French roots related to 'allow' (Old French 'alouer' / Old English 'alawan'), where the root meant 'to permit' or 'to give leave'.

'temporarily' developed from Latin 'temporarius' into Medieval/Old French and Middle English forms and became the adverb 'temporarily' in modern English; 'allow' passed from Old French/Old English forms (e.g. 'alouer', 'alawan') into Middle English 'allowen' and then modern English 'allow', with 'allowed' as its past/past participle.

Initially, the components meant 'relating to time' (from 'temporarius') and 'to permit' (from 'allow'); combined, they now convey the modern meaning 'permitted for a limited time', which closely follows the original component meanings.