The spelling of the word "roseberry" can be explained using the International Phonetic Alphabet (IPA) transcription. The word is pronounced as /rəʊzbɛri/ with the stress on the second syllable. The initial sound in "rose" is /r/, followed by a diphthong /oʊ/, and a consonant blend /z/ and /b/. The final syllable has a short /ɛ/ sound and a /r/ sound at the end. The spelling of "roseberry" accurately represents its pronunciation, making it easy to recognize and understand.