"Echidnine" is a word that can appear quite daunting to spell, but it is actually quite simple when you break it down phonetically. The IPA phonetic transcription for "echidnine" is [ɪˈkɪdnɪn]. The stress syllable is on the second syllable, which is pronounced as "kidd." The "e" in "echid" is pronounced like the "e" in "bet," and the "i" in "nine" is pronounced like the "i" in "sit." Together, the word refers to a type of toxin found in the spines of echidnas.