Verb (used with object) : She combined the ingredients to make the cake. They combined the two companies. ,a plan that combines the best features of several other plans.    From Dictionary.com. 

Verb (used without object) : The clay combined with the water to form a thick paste. ,After the two factions combined, they proved invincible.    From Dictionary.com. 

As we take a look at the second non-combining Constructicon being released, we find he is a triplechanger ... of sorts.    From Wordnik.com.  [TFormers.com] Reference

Using Energon Demolisher and Universe Grindcore and replacing purple Scavenger with RID Grimlock, I have 6 decent, but non-combining Constructicons.    From Wordnik.com.  [Transformers News] Reference

And that means that the non-combining units get to look more like the movie counterparts, instead of sacrificing something for the ability to combine.    From Wordnik.com.  [Transformers News] Reference