According to Rashi's first commentary on Vayikra 25:46, what would be the distinct meaning of the verse with "והנחלתם" vs. with "והתנחלתם"?
והתנחלתם אתם לבניכם means, you may hold them as your possession, לבניכם אחריכם, for the benefit of your children after you. It would not, however, be correct to give the word והתנחלתם the meaning: “leave them as an inheritance to your children”, for if this were intended it should have written: והנחלתם אותם לבניכם (the Hiphil), but והתנחלתם (which is the Hithpael form) is equivalent to והתחזקתם “you may hold them as your possession”.
Thank you