Hi, I have a new question here.
Sometimes I hear the phrase "kind of" said before an adjective,
for example,
I'm kind of hungry. (the example is given by myself, I can't remember exactly what I heard. Is this example correct?)

So is this usage of "kind of" correct?

Does it mean "to certain degree"?

And can it put in front of an adverb?

I also hear "sort of". Does it mean the same? What's the difference?

Thanks in advance.
"kind of" and "sort of" are both very common in everyday speech, and are interchangeable. As you say, they both mean "to a certain degree", but in practice they may be used almost meaninglessly as "fillers" when hesitating (like "um" and "er"), or to "soften" a sentence that would otherwise feel stark.

Yes, you can use them in front of an adverb: "We were walking kind of slowly...".
Mr. Wordy did mention that they are common in everyday speech, but I think it should be added that they should not be used in formal writing.
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Oh, my! I forgot to login. It became anonymous
Both kind of and sort of are rather informal English and mean somewhat, to a certain degree, almost
 Mr Wordy's reply was promoted to an answer.
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Got it.
Thank you both, Ivanhr and Mr. Wordy
 Philip's reply was promoted to an answer.