Threw together is a phrasal verb that means haphazardly putting things or ideas together with no proper planning or consideration. Some antonyms for this phrase include organized, planned, deliberate, methodical, systematic, careful, and thoughtful. These words all suggest a more intentional and purposeful approach to creating something. Instead of hastily throwing together a meal, for example, one might carefully plan a menu and take time to prepare each dish. Likewise, instead of throwing together a last-minute presentation, one might plan ahead, gather resources, and create a thoughtful, well-designed visual aid. Taking a deliberate and thoughtful approach to tasks can lead to better outcomes and more successful results.