This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. made tough by habitual exposure

"In a state of utter constraint, to appear natural is, however, an effort too difficult to be long sustained; and neither precept, example, nor disposition, have enured my poor child to the performance of any studied part."

enured    enures    enuring   

inure