This is the 52nd most frequent Italian word.
lavoro
Work; job; labor.
In this sentence, 'lavoro' is used as a noun meaning 'work' in the sense of tasks or duties to accomplish.
Ho molto lavoro da fare oggi.
I have a lot of work to do today.
Here, 'lavoro' is a verb in the present tense meaning 'I work' or 'I am employed as'.
Lavoro come insegnante in una scuola.
I work as a teacher in a school.
In this example, 'lavoro' is also a noun, but it refers to the result or product of someone's work.