Yo kāreti sa hetu

1. So puriso taṃ purisaṃ kammaṃ kāreti (the man causes the man to do the work); so puriso tena purisena kammaṃ kāreti; so puriso tassa purisassa kammaṃ kāreti. (The object of the causative can also be in the third inflection, “tena purisena”, and in the sixth inflection, “tassa purisassa”.)
2. Thus with “hāreti”, to cause to carry; “pāṭheti”, to cause to read; “pāceti”, to cause to cook; “dhāreti”, to hold.

What is the use of the name “hetu” (cause)? For the use of the name “hetu” in the sutta “Dhātūhi ṇe-ṇaya-ṇāpe-ṇāpayā kāritāni hetvatthe” (§438). After roots, the causatives ‘ṇe’, ‘ṇaya’, ‘ṇāpe’ and ‘ṇāpaya’ [are used] in the meaning of cause.