The spelling of "spacely" can be somewhat confusing due to the various pronunciations of the "ce" sound in English. In this case, "spacely" is pronounced as /ˈspeɪsli/. The "ce" is pronounced as an "s" sound, followed by an "ly" ending, indicating that it modifies the word "space". The spelling of the word accurately reflects its phonetic pronunciation, making it easier for speakers of English to properly enunciate the word.