Here's a breakdown:
* Iraq: Uses a dialect known as Iraqi Arabic. It's influenced by Persian, Kurdish, and Turkish, and has a more guttural sound.
* Jordan: Uses a dialect known as Levantine Arabic. It's influenced by Syrian and Palestinian Arabic, and tends to be more melodic and faster-paced.
While there are similarities, the differences in pronunciation, vocabulary, and grammar are significant enough that speakers from each country would likely struggle to understand each other completely.
Think of it like this: Imagine someone from the Southern US trying to understand someone from the North East. While both speak English, their accents and slang are different enough to cause confusion. The same principle applies to Iraqi and Jordanian Arabic.
However, standard Modern Standard Arabic (MSA) is used for formal communication, education, and media in both countries. This standardized form of Arabic is understood throughout the Arab world, though it is rarely spoken in everyday conversation.