The word ‘work’ can function as different parts of speech, primarily as a noun and a verb, depending on its use in a sentence.
As a noun, ‘work’ refers to an activity involving mental or physical effort done in order to achieve a purpose or result. For example, in the sentence, ‘After a long day’s work, I feel exhausted‘, ‘work’ is a noun describing the tasks completed during the day.
As a verb, ‘work’ means to engage in physical or mental activity to achieve an intended result. For instance, in the sentence, ‘She works at the local hospital‘, ‘works’ is a verb indicating the action of laboring in that profession.
In summary, the part of speech of ‘work’ depends on how it is used in a sentence: it serves as a noun when referring to a job or task, and as a verb when indicating the act of performing a job or task.