The word "murtha" is a difficult one to spell. It is pronounced /ˈmɜːθə/ in IPA phonetic transcription, which can be confusing for those unfamiliar with the language. The combination of the silent "h" and the two vowel sounds can be tricky to remember. However, with practice, one can become more familiar with the spelling and pronunciation of this word. It is important to pay attention to the sounds of each letter and practice using the word in context to improve spelling proficiency.