This is the 12258th most frequent Korean word.
다이어
"다이어" is Konglish for "diet," meaning a regimen for controlling food intake or losing weight.
Here '다이어(다이아)' refers to 'diamond', commonly used in Korean as a transliteration from English.
다이어(다이아) 왕관이 정말 아름다워요.
The diamond crown is really beautiful.
In this case, '다이어' denotes 'diamond' as an attributive descriptor for embellishment.
그 여배우는 다이어 드레스를 입고 나타났다.
The actress appeared wearing a diamond-studded dress.
This refers to '다이어' indicating diamonds as material used for decorative purposes.