لِإِنَاخَةِ الْبَعِيرِ — to make the camel kneel.
لِـ: preposition indicating purpose here.
إِنَاخَةِ: verbal noun, genitive with kasrah; first term of the iḍāfah.
الْبَعِيرِ: genitive second term with kasrah.
إِنَاخَة is a verbal noun naming the action. It is not the same word-class as the animal call نخ.