what are 4 ( four ) prefixes would fit before the word root -ject?

Here are four prefixes that fit before the word root "-ject":

1. In-: (meaning "into" or "not")

* Inject: to force a liquid into something, like a syringe injecting medicine.

* Injected: past participle of "inject"

2. Pro-: (meaning "forward" or "in favor of")

* Project: to plan and carry out a task, like a project at work.

* Projected: past participle of "project"

3. Re-: (meaning "again" or "back")

* Reject: to refuse something, like rejecting a job offer.

* Rejected: past participle of "reject"

4. Sub-: (meaning "under" or "below")

* Subject: a person or thing being discussed or studied, like a subject in school.

* Subjected: past participle of "subject"

Let me know if you'd like more prefixes or examples!