"Is Quran a clear book or not? If it is a clear book then why an arab speaker has to consult a dictionary to know what a very ordinary and popular word like 'dha-ra-ba' means in the Quran? Why didn't god also send down a dictionary with Quran because if you send a code to me without the key I wouldn't be ablet o read it and your message is not complete."
Peace be on to you all !
First of all Quranic arabic is not the spoking language of arabs. I will answer your questions 1 by 1 through Quran.
"Is Quran a clear book or not?"
Chapter The Moon (Al-Qamar) 5417
And We have indeed made the Qur'an easy to understand and remember then is there any that will receive admonition?
it is easy only for those who really want to take guaidance from it.
"If it is a clear book then why an arab speaker has to consult a dictionary to know what a very ordinary and popular word like 'dha-ra-ba' means in the Quran?"
Chapter Detailed (Fussilat) 4144
And if We had made it a Quran in a foreign tongue, they would certainly have said Why have not its communications been made clear? What! a foreign (tongue) and an Arabian! Say It is to those who believe a guidance and a healing; and (as for) those who do not believe, there is a heaviness in their ears and it is obscure to them; these shall be called to from a far-off place.
"Why didn't god also send down a dictionary with Quran because if you send a code to me without the key I wouldn't be ablet o read it and your message is not complete."
Chapter (Muhammad) 4724
Do they not then earnestly seek to understand the Qur'an, or are their hearts locked up by them?
Chapter The Children of Israel (Ban? Israel) 1789
And We have explained to man, in this Qur'an, every kind of similitude yet the greater part of men refuse (to receive it) except with ingratitude!