Reciting Quran without Tajweed
Answer:
In the name of Allah, the most Beneficent, the most Merciful.
Tajweed is the science of reciting the Qur’an in accordance with the established rules and regulations of pronunciation so each letter is recited properly and correctly.
All the Ulamaas agree that it is compulsory to recite the Qur’an with Tajweed.
Allah 
in the Holy Qur’an has said ‘And recite the Qur’an with Tarteel…’ (Surah Al-Muzzammill v.4). Tartill basically signifies that the letters and the words must be pronounced clearly and distinctly (Maariful Quran p.616 v.8)
The one who does not recite the Qur’an properly with tajweed and the correct pronunciation, then the Prophet of Allah 
said ‘ There are many are who recite the Qur’an while the Qur’an curses them’.
Only Allah Knows Best
Mohammed Tosir Miah
Darul Ifta Birmingham.