The word "WOPR" is commonly misspelled due to its unconventional pronunciation. The correct spelling can be explained using the International Phonetic Alphabet (IPA) as follows: /wɑpr/. The "W" is pronounced as the English letter, followed by the sound of the "ah" in "father". The "O" is pronounced as the sound of the "o" in "not", and the "P" is pronounced as the English letter. The "R" is pronounced as a slightly prolonged, rolling "r" sound. Therefore, correct spelling of "WOPR" is vital for accurate pronunciation.