* Primary stress: falls on the second syllable "na"
* Secondary stress: falls on the first syllable "in"
This secondary stress helps distinguish it from the word "international" without the prefix "in-". The secondary stress makes it clear that the word is "in" something that is "national".
Here's how the word would look phonetically with stress markings:
ɪntərnæʃənəl
Other examples of compound words with secondary stress include:
* understanding
* predetermine
* reconsideration
* cooperate
* individual
Remember that secondary stress is usually weaker than primary stress, but it still helps to clarify the meaning of the word and make it easier to pronounce.