The spelling of the word "hayder" may seem unusual to some, but it actually follows the rules of English phonetics. In IPA transcription, "hayder" is pronounced as /heɪdər/. The "h" at the beginning is silent, while the long "a" sound is captured by the "ay" digraph. The "d" and "r" sounds are both crisp and clear, and the final "er" sound is represented by the schwa vowel sound /ə/. So, although it may not look like a traditional English word, "hayder" is spelled according to the rules of phonetics.