ageing
noun
[ ˈeɪdʒɪŋ ]
• the process of growing old.
• "the external signs of ageing"
ageing
adjective
• (of a person) growing old; elderly.
• "an ageing population"
age
verb
• grow old or older.
• "the tiredness we feel as we age"
Origin:
Middle English: from Old French, based on Latin aetas, aetat-, from aevum ‘age, era’.
