The spelling of the word "Spastrex" may seem unusual at first glance, but it is actually quite intuitive when considering its pronunciation. In IPA phonetic transcription, the word would be spelled /ˈspæstɹɛks/, with the "a" sound in the first syllable pronounced like the "a" in "cat." The "trex" ending is pronounced like "treks," similar to the dinosaur "Tyrannosaurus Rex." Overall, the spelling of "Spastrex" accurately reflects its pronunciation and distinctive character.