What is an adverb for study?

There isn't a single perfect adverb for "study" as it depends on the context. Here are some options, with examples:

For intensity or effort:

* Diligently: She studied diligently for her exams.

* Assiduously: He studied assiduously every day.

* Intensely: They studied intensely for the competition.

For duration:

* Briefly: We briefly studied the history of the city.

* Thoroughly: They thoroughly studied the research paper.

For method:

* Independently: She studied independently for the test.

* Collectively: They studied collectively in a group.

For focus:

* Specifically: He studied specifically for the math exam.

* Exclusively: She studied exclusively for the history course.

For outcome:

* Successfully: They successfully studied for the exam.

* Effectively: She effectively studied the material.

The best adverb to use will depend on what you want to emphasize about the study.