'Ariyyah means that a man gives another man a palm-tree on loan, or it means that reserves one or two palm-trees from his property for his personal use, then he sells for dried dates.  

أَنَّهُ قَالَ الْعَرِيَّةُ الرَّجُلُ يُعْرِي الرَّجُلَ النَّخْلَةَ أَوِ الرَّجُلُ يَسْتَثْنِي مِنْ مَالِهِ النَّخْلَةَ أَوْ الاِثْنَتَيْنِ يَأْكُلُهَا فَيَبِيعُهَا بِتَمْرٍ  

'Araya means that a man lends another man some palm-trees, but he (the owner) feels inconvenient that the man looks after the trees (by frequent visits). He (the borrower) sells them (to the owner) by calculation.  

أَنْ يَهَبَ الرَّجُلُ لِلرَّجُلِ النَّخَلاَتِ فَيَشُقَّ عَلَيْهِ أَنْ يَقُومَ عَلَيْهَا فَيَبِيعَهَا بِمِثْلِ خَرْصِهَا