With this form, the English word "of" is then placed in between the words in translation.
You may remember that אב, ahv, means "father". Here, it is plural: "fathers" =אבות ahVOHT.
The suffix: כֶם KHEM = "of yours" or simply "yours".
Here it is the masculine plural "your", so perhaps in English better rendered as "y'all!".
Are you able to find these words in this excerpt from Tanakh above?
Remember to keep Hebrew fun!