This is the 16592nd most frequent Korean word.
사무실을
"사무실을" means "office," with the object particle "-을" indicating it as the object of a sentence.
In this sentence, '사무실을' (the office) acts as the direct object of the verb '청소하다' (to clean).
나는 아침마다 사무실을 청소합니다.
I clean the office every morning.
Here, '사무실을' (office) functions as the direct object of the verb phrase '찾고 있다' (to be looking for).
그는 새로운 사무실을 찾고 있습니다.
He is looking for a new office.
In this example, '사무실을' (office) serves as the direct object of the verb '임대하다' (to rent).