Gibbously is a seldom used adverb that describes something that has a protuberance or hump. Its phonetic transcription is /ˈɡɪb.əs.li/. The "g" is pronounced as a hard "g" like "go" while the "i" as in "sit" and "b" as in "baboon". The "o" is pronounced as in "open". The accent falls on the second syllable "bous". The ending "ly" is pronounced as "lee". In summary, "gibbously" is spelled as G-I-B-B-O-U-S-L-Y with the accent on the second syllable.