age-old
Word family
Synonym discussion
Sense: adjective/1
All four words describe things that have lasted a long time, but they fit different scenes. 'Age-old' is the everyday choice for traditions, questions, or human problems that span many generations — 'an age-old custom', 'the age-old question of free will'. 'Ancient' reaches further back and works for physical things too, like 'ancient ruins' or 'an ancient civilisation'. 'Time-honoured' adds warm respect: a 'time-honoured recipe' is one people still trust because it has lasted. 'Long-standing' is the most neutral and the most office-friendly — use it for agreements, friendships, or disputes ('a long-standing client', 'a long-standing dispute') where you only want to flag duration, not cultural weight.
Common collocations
Etymology
A compound formed in English in the early 1800s by joining the noun 'age' (a long period of time) with the adjective 'old'. The hyphen turned the two words into a single descriptive label meaning 'old as the ages themselves'. The pattern echoes other English compounds like 'lifelong' and 'centuries-old'.