The spelling of the word "brought block" can be explained using the IPA phonetic transcription. The /b/ at the beginning of both words is pronounced with the lips together, followed by the sound of the vocal cords vibrating to create the /r/ sound. The /ɔ/ in "brought" is pronounced with an open mouth, while the /ɑ/ in "block" is pronounced with a slightly more closed mouth. The final /t/ in each word is a quick release of air with the tongue tapping against the roof of the mouth.