The word "gibba" is spelled with a short "i" sound followed by "bb" and "a". In IPA phonetic transcription, it is written as /ˈɡɪbə/. The "i" sound is represented by /ɪ/ and is pronounced similar to "ih". The double "b" is pronounced as a quick, forceful burst of air, representing the consonant sound /b/. The final "a" is pronounced as the schwa sound, represented by /ə/, which is a neutral, unstressed vowel sound.
The etymology of the word "gibba" traces back to Late Latin "gibba" meaning "hump". It can be derived from the Latin term "gibbus", which also means "hump" or "humped". The word entered English through Middle English, where it appeared as "gibbe", retaining its original meaning of a rounded protuberance or a hump. Over time, the spelling evolved to "gibba", with a slight modification.