The spelling of "under mad" can be a bit tricky for non-native speakers of English. The word "under" is pronounced with the schwa sound /ə/ in the first syllable and the voiced dental fricative /ð/ in the second syllable. The word "mad" is pronounced with the vowel sound /æ/ in the first syllable and the voiced alveolar stop /d/ in the second syllable. Therefore, the IPA transcription of "under mad" is /ˈʌndər mæd/. Remembering the correct spelling and pronunciation of this phrase can help improve English language skills.