IPA: /ˈoʊldɪst/
KK: /oʊldɪst/
The term used to describe something that has existed for the longest time or is the most advanced in age compared to others.
My grandmother is the oldest member of our family.
Oldest → It is formed from "old" (from Old English *eald*, meaning having lived for a long time) and the suffix "-est" (used to form the superlative degree). The word "oldest" means having the greatest age or being the most advanced in age.
Think of 'old' as something that has been around for a long time, and '-est' indicates the highest degree. This helps you remember that 'oldest' refers to something that is the most aged.