The spelling of the word "most teratoid" can be a bit tricky to decipher. The word "teratoid" refers to something resembling a teratoma, which is a type of tumor made up of cells from different organs or tissues. The "oi" in "teratoid" is pronounced as a diphthong, with the "o" sound transitioning into the "i" sound. Meanwhile, the "t" in "most" is pronounced as a voiceless dental stop. The IPA phonetic transcription for "most teratoid" would be: /moʊst tɛrətɔɪd/.