How do you say this word quadrilateral?

How do you pronounce Golden Quadrilateral?

Golden Quadrilateral Pronunciation. Gold·en Quadri·lat·er·al.

How is are pronounced?

It is pronounced /ɑ:/ (without /r/) when it is stressed: /ɑ:/ What ARE you doing? I don’t think they are.

Do we pronounce the L in world?

Not even a tiny bit, it is completely silent as it is followed by a consonant. The ‘l’ in world is dark because it comes after a vowel sound. Your tongue should raise at the back and the front, it is a very soft sound, not like the clear /l/ you find at the beginning of a word.