كَيْ often appears with the prepositional lām, or lām jārrah, as لِكَيْ; both express purpose here.
جِئْتُ لِكَيْ أَفْهَمَ الْقُرْآنَ — I came so that I might understand the Quran.
جِئْتُ لِكَيْ أَتَعَلَّمَ — I came so that I may learn.
The lām is often omitted, as in كَيْ أَفْهَمَهُ. Do not treat كَيْ and لِكَيْ as opposite meanings.
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Kay, Idhan, Hatta and Purpose Li
كَيْ often appears with the prepositional lām, or lām jārrah, as لِكَيْ; both express purpose here.
جِئْتُ لِكَيْ أَفْهَمَ الْقُرْآنَ — I came so that I might understand the Quran.
جِئْتُ لِكَيْ أَتَعَلَّمَ — I came so that I may learn.
The lām is often omitted, as in كَيْ أَفْهَمَهُ. Do not treat كَيْ and لِكَيْ as opposite meanings.