Throwing in together means to combine or mix some things or people together. The antonyms for throwing in together can vary based on the context of usage. For instance, segregating, separating, or dividing can be antonyms when it comes to grouping people. On the other hand, dispersing, scattering, or spreading out can be antonyms when referring to combining things. Similarly, the use of disbanding, disuniting, or disconnecting can also be considered antonyms for throwing in together. In general, antonyms for throwing in together refer to actions that reverse the process of bringing things or people together.