The word "defrank" is a verb meaning to deprive of franking privilege. The spelling of this word can be explained using the International Phonetic Alphabet (IPA). The first syllable "de-" is pronounced as /diː/, the "frank" part is pronounced as /fræŋk/, and the final syllable "-ed" is pronounced as /ɪd/. Therefore, the phonetic transcription of "defrank" is /diːfræŋkɪd/. It is important to spell words correctly to ensure clear communication and avoid confusion.