Leithe is a word that has not been included in the English language. Therefore, there is no standardized spelling or pronunciation. However, based on the phonetic transcription in the International Phonetic Alphabet (IPA), the spelling of this word would be /liːθ/. The symbols /l/ and /θ/ represent the consonant sounds "l" and "th" respectively, while the symbol /iː/ represents the long vowel sound "ee". Without more context, it is impossible to determine the meaning or origin of this word.