The spelling of the word "wert compatible" may seem tricky, but it can be easily explained using phonetic symbols. The first sound is /w/ followed by the vowel sound /ɜː/ (like the "ur" in "burn"). The /r/ is pronounced with a slight roll and is followed by a soft /t/ sound. The second word is pronounced with a pronounced /k/ sound, followed by the vowel sound /əʊ/ (like the "o" sound in "go"), a soft /m/ sound, and ending with a soft /p/ sound.