Well, firdt of all there is "ci" and "ć". "Ci" sounds a bit longer than "ć". It sounds like English's "chea" but you need to say it harder (try google translate) - but, you need to know it just sounds similar, it's still not that how it should. "CZ" is sounds like "ch" in English. For example you say "cztery" not "ćtery"/"citery" (in that way small children used to speak).
Okay I am sorry, but I most note this: the Slavic words for Aunt sound very similar to the Spanish word "chocha", especially here in Polish where the T is softened to sound like ch/tch. Maybe it's a weird coincidence, but one never knows.