كي

In a sentence

• أدرس كي أنجح.

  I study in order to succeed.

  In this sentence, 'كي' is used to express the purpose or goal of the action.

• كي لا تصل متأخراً، انطلق الآن.

  So that you don't arrive late, start now.

  Here, 'كي' indicates a preventative purpose or reason for the action.

• قرأ الكتاب بتمعن كي يفهم الأفكار جيداً.

  He read the book carefully so that he could understand the ideas well.

  In this context, 'كي' is used to introduce the intended result or outcome.