An archaic or rare adjective meaning ardent, passionate, or burning with intensity.
From 'ardure' or directly from Latin 'ardor' with the '-ous' suffix, possibly influenced by 'arduous.' This word is primarily found in Middle English and Early Modern English texts and is rarely used in contemporary writing.
The word 'ardurous' is so old that it almost disappeared—if you found it in a 16th-century poem, you'd be seeing language that modern dictionaries have forgotten about.
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