forty-nine-year-old
UK[ˈfɔːti naɪn jɪər əʊld]US[ˈfɔːrti naɪn jɪr oʊld]
adj
Being forty-nine years of age.
n
A person who is forty-nine years old.
Morpheme Breakdown
forty-nine
year
old
forty-nine
year
old
Etymology
The term is a modern English compound adjective and noun, constructed entirely from native Germanic elements. The numeral 'forty-nine' combines the base-ten system of 'forty' (itself from Old English 'feowertig', meaning four tens) with the unit 'nine'. This is attached to the Old English words 'gear' (year) and 'eald' (old), which have consistently denoted age and the passage of time. The compound's logic is transparently arithmetic and descriptive, directly stating a person's or thing's age as forty-nine years. This pattern of age designation (number-year-old) exemplifies the analytic and compounding nature of English, creating precise modifiers and nouns from simple, foundational vocabulary.
Analysis
Structure: forty-nine + year + old
forty-nine: A compound numeral from Old English 'feowertig' (four tens) and Old English 'nigon' (nine). Functions as a numerical quantifier.
year: From Old English 'gear', meaning a period of twelve months. Functions as a unit of time.
old: From Old English 'eald', meaning advanced in age. Functions as an adjectival descriptor.
Examples
She is a forty-nine-year-old architect from Boston.
The program is designed for the forty-nine-year-old who is planning for retirement.
He bought a forty-nine-year-old bottle of whisky at the auction.