I am currently studying syllable stress.
When I look at the word begonia we can split it into 3 syllables with the stress on 'go'. E.g bih-gohn-yuh.
However, the plural form of the word gives me 4 syllables: begonias with the 'go' still stressed. I feel like the 'nia' should be stressed. What is the correct stress of the plural?
Is there a stressed syllable rule for plural words in English?