Verb (5-dan, る, intransitive)
1. to be mixed; to be blended with; to be combined
usu. 混じる
そこには確かに、恐怖の色も混じっていた。There was indeed a hint of fear mixed in.
2. to associate with; to mingle with; to interest; to join
usu. 交じる
俺があそこに混じるのは無理だって。I'm telling you, there's no way I could join in over there.