The spelling of the word "Roxbert" can be explained using the International Phonetic Alphabet (IPA). The first syllable "Rox" is pronounced as /rɒks/, with the "o" sound similar to the one in the word "rock". The second syllable "bert" is pronounced as /bɜrt/, with the "e" sound similar to the one in "bird". Therefore, the full pronunciation of "Roxbert" would be /rɒksbɜrt/. This can be helpful in ensuring proper pronunciation and spelling of the word.