The spelling of the word "retno" can be explained using the International Phonetic Alphabet (IPA) as /ˈrɛtnoʊ/. The first syllable is pronounced with an open-mid, unrounded vowel sound (/ɛ/), followed by a voiceless alveolar stop consonant (/t/). The second syllable contains a high-mid, back, rounded vowel sound (/oʊ/). The spelling of this word could be tricky as it does not follow common English spelling patterns, but it can be easily pronounced using its phonetic transcription.