This is the 572nd most frequent Korean word.
늘고
"늘고" means "increasing" or "growing."
In this sentence, '늘고' means 'improving' or 'increasing', referring to the development of Korean language proficiency.
한국어 실력이 늘고 있어요.
My Korean skills are improving.
Here, '늘고' signifies an increase in the numerical count of members.
회원 수가 늘고 있습니다.
The number of members is increasing.
In this context, '늘고' denotes a rise in weight or physical mass expansion.