The word "Taintworm" is spelt as /teɪntwɔːrm/ in IPA phonetic transcription. This word is a combination of the word "taint", meaning to contaminate or spoil; and "worm", referring to a long, slender, crawling animal. The "ai" combination in "taint" is pronounced as /eɪ/, while "tw" in "worm" is pronounced as /tw/. Overall, the spelling of "Taintworm" accurately reflects its meaning and emphasizes the negative connotation associated with this slimy creature.