Advise is the verb. Advice is the noun. One letter changes the job. Counselors advise students. Students take advice. Diction as a set is in word choice.
Can you put to in front
To advise works. To advice does not. If the word is naming the thing given, it is advice. If someone is doing the giving, it is advise.
Principal versus principle is the same kind of look-alike, in principal versus principle. Affect versus effect is in affect versus effect. Grammar overall is in ACT grammar rules.
The bottom line
Verb: advise. Noun: advice.
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