The word "Placyd" is spelled with a "c" instead of a "s" because it is derived from the Latin word "Placidus," which has a hard "c" sound. Therefore, the spelling of "Placyd" is a reflection of its Latin roots. In IPA phonetic transcription, the pronunciation of "Placyd" would be /ˈplæsɪd/, with a hard "c" sound represented by the /s/ symbol in the English alphabet. Although the spelling may be confusing to some readers, it accurately represents the word's origin and pronunciation.