The spelling of the word "hebr" may seem odd, but it actually derives from the phonetic transcription of the English word "herb". In IPA, the /h/ sound is represented by the symbol /h/, while the short vowel sound /ɜ/ (as in "herd") is represented by the symbol /ɛ/. Thus, the word "herb" becomes /hɛrb/ in IPA. The spelling with a silent "h" only came into use in the 19th century, likely due to French influence on English spelling.