The spelling of the word "MPLSETH" can be a bit tricky at first glance, but it becomes easier when we break it down using the International Phonetic Alphabet (IPA). Firstly, the "M" is pronounced as /ɛm/ and is followed by a "P" pronounced /pi/. The "L" sounds /ɛl/ and the "S" is pronounced /ɛs/. The next part of the word is "ETH", which is spelled using a "TH" digraph and is pronounced /ɛθ/. When all the pieces come together, we have the phonetic transcription /ɛmplseth/ for "MPLSETH".