The spelling of the word "preecho" can be explained through the IPA phonetic transcription of its pronunciation. The word is pronounced as "pri-cho" with stress on the first syllable. The "ee" in the first syllable represents a long "i" sound, while the "o" in the second syllable represents a short "o" sound. The "ch" sound is created by the combination of the letters "c" and "h". Overall, the spelling of "preecho" accurately reflects its pronunciation.