What part of speech is the word care?

The word "care" can be several parts of speech depending on its context:

* Noun: It can refer to a state of worry or concern, like in "He has a lot of care on his mind."

* Verb: It can mean to feel concern or worry about something, like in "I care about your well-being."

* Verb: It can also mean to provide attention and support, like in "She cares for her elderly mother."

So, to determine the part of speech, you need to look at the sentence it's used in and its role.