Talk:Mutsuki/@comment-89.156.46.170-20150827145314/@comment-4125495-20150828010133

It's basically easier to say if you voice the first consonant in the second kanji in some cases. Kikuzuki is easier to say than Kikutsuki is. This is called Rendaku. It can be a frustrating element of the language since there's no hard-and-fast rules. There's some general rules but they have lots of exceptions.