There is no permanent accent in Arabic. It often changes and stops at different words. What's worse, the accent can be completely different in each dialect!
Fortunately, a general scheme has been developed to facilitate correct accentuation.

1. The accent is on the first long vowel from the end
2. If there are only short vowels in a word, the accent will be on the first
3. When a preposition is combined with a pronoun, it takes over the accent
4. When there is a long vowel at the very end, the accent is at the very beginning of the word

What is not accented?

1. The article ال
2. Conjunctions
3. Particle
4. Prepositions