The word "re-starts" implies the act of beginning again or resuming something that has stopped. Here are a few antonyms (opposite words) for "re-starts":
1. Ends - signifying the completion of something rather than the continuation of it.
2. Halts - indicating to stop, break, or pause.
3. Finishes - means the accomplishment of a task or a goal, rather than the initiation of it.
4. Concludes - suggests the end of an event or occurrence.
5. Abandons - means to leave or give up on something rather than restarting it.
6. Closes - signifies the conclusion of an affair, business, or deal.
These antonyms denote a sense of completion, cessation, or abandonment of an activity, rather than resuming it.