문해력이 · 문해력을
literacy, reading comprehension
Example
최근 청소년들의 문해력이 떨어졌다는 기사가 많습니다.
There have been many articles recently saying teenagers' literacy has declined.
Word parts
문 writing+해 untie+력 power
Literally 'power to untangle writing'.
Good to know
A popular news buzzword; it means understanding what you read, not just being able to read.