Step 1: “Commissioned” refers to the act of assigning or authorizing a task, typically the initiation of a project or work.
Step 2: The opposite of commissioning something would be to “revoke” the commission, which means to cancel or withdraw it.
Step 3: “Started” and “finished” relate to the completion or initiation of a task, but do not reflect the cancellation of an order or task. “Terminated” implies the ending of a process but not necessarily revocation of a commission.
Thus, the correct answer is: “revoked.”