The spelling of the word 'was opinion' is quite straightforward when broken down phonetically. The first syllable 'was' is spelled phonetically as /wɒz/ (wahz), while the second syllable 'opinion' is spelled as /əˈpɪnjən/ (uh-pin-yuhn). So, when put together, the correct spelling of 'was opinion' is 'was opinion'. It's always essential to understand the phonetics of a word to get the spelling right, especially when dealing with tricky words.