After pra a, a word which does not denote a part of the body has acute accent (udātta) on the final when the compound is a name.,
Thus प्रकोष्ठ꣡म्, प्रगृह्य꣡म्, प्रद्वार꣡म् ॥ Why do we say 'not denoting a body part'? Observe प्र꣡हस्तम्, प्र꣡पदम् ॥ Why do we say 'when a Name'? Observe प्रपीठम् ॥,