The phrase "tees off" refers to the act of beginning play in golf. There are many antonyms for this phrase, as it can be seen as a specific action that can be countered by a variety of opposing actions. Some antonyms for "tees off" might include "finish," "conclude," "end," "terminate," or "complete." These words all imply an ending or completion of something, rather than the beginning of something as "tees off" does. Other antonyms might include "cease," "halt," "stop," or "pause," which all suggest a cessation of action rather than a commencement. Regardless of the antonym used, the phrase "tees off" remains a key term in the lexicon of golf.