The spelling of the word "wicko" is a bit tricky as it is not a commonly used word. However, it can be broken down using IPA phonetic transcription as /wɪkəʊ/. This means that the "wi" in "wicko" is pronounced as the word "win" without the "n". The "k" sound is aspirated, similar to the "k" in "kid". The "o" at the end is pronounced as the long "o" sound, like the one in the word "go".