enquiry

concerning, departmental, released, scientific

The departmental enquiry into the accident took several months to complete.

answering, long-awaited, said

The company said an enquiry into the accident would begin next week.

action, human

The police launched an enquiry into the missing person case last week.

despite

Despite the lengthy enquiry, the company was never found to have broken any laws.

finally, promptly

After waiting weeks for a response, the company finally responded to my enquiry about the refund.