The Affricates c, č, dz, dž

An affricate is a sound that starts as a stop and bursts open into a hiss — your tongue blocks the air for an instant, then releases it into a fricative. English has two of them: the ts in cats and the ch in church. Czech has four, and the most important thing to learn is that one of them, the plain letter c, is not what an English speaker expects. This page sorts all four out so you never read a Czech c as an English "k" or "s" again.

The four affricates come in two voiceless/voiced pairs. The voiceless ones (c and č) are extremely common; the voiced ones (dz and dž) are rare and turn up mostly in loanwords or where two morphemes meet. So the practical priority is clear: nail c and č, and just learn to recognise dz and dž when you see them.

The single biggest beginner error in the whole topic is reading c as if it were English. In English, the letter c is read as "k" (cat) or "s" (city), depending on the word — it never has a stable value. In Czech, c is always [ts], the sound at the end of cats, every single time. There is no "soft c," no "hard c." Burn this in now: Czech c = ts.

The four affricates

The pattern is tidy: the háček turns a "ts/ds" sound into a "ch/j" sound, exactly the way it turns s into š on the sibilants page. And the voicing is a left-to-right relationship: c is the voiceless partner of dz; č is the voiceless partner of dž.

c — always [ts], never [k] or [s]

This is the one to drill. Wherever you see c in a Czech word, say the ts of cats — at the start of a word too, which feels strange to English speakers because English never starts a word with ts.

In cukr (sugar), the word begins with a ts sound: "TSU-kr." In práce (work) and noc (night), the c in the middle and at the end is the same ts. There is never a version where c is read as k or s.

č — the "church" sound

This one is easy for English speakers, because č is exactly the ch of church, cheese, and much. The trap is only in spelling: that sound is never written ch in Czech (Czech ch is a totally different, raspy sound — see the h versus ch page). The "church" sound is always the háček letter č.

So čaj is "chai," klíč (key) ends in the ch of church, and večer (evening) has it in the middle. If you can say church, you can say č.

c versus č — keep them apart

Because they differ only by the háček, the contrast is worth a moment. Hear the difference: c is ts (hiss like s), č is tch (hush like sh).

A useful real-word minimal-ish contrast: cesta (road, journey) starts with ts, while česat (to comb) starts with the ch of church. Listen for the s-hiss versus the sh-hush at the start.

dz and dž — the voiced pair (rare)

These two are the voiced partners of c and č. You will not produce them often, but you should recognise them.

dž is the j of judge or jam. It appears almost entirely in loanwords:

dz is the voiced version of c, like the ds in roads. As a true single sound it is genuinely rare in native words; far more often, the letters d and z simply meet at a morpheme boundary and blend together in speech. The classic case is podzim (autumn), built from the prefix pod- ("under") plus -zim (related to zima, winter): in careful speech you may hear d-z as two sounds, but in normal speech they fuse to a single voiced dz.

How voicing connects them

Notice the symmetry, because it pays off elsewhere. Each voiceless affricate has a voiced twin, and in connected speech Czech swaps between them by voicing assimilation — a voiced consonant in front can turn c into dz, just as it turns s into z. You do not need the full rule yet, but the reason c and dz are taught together is that they are two faces of the same sound. The complete mechanism is on the voicing assimilation page.

Common mistakes

Key takeaways

• c is always [ts] (the ts of cats) — never English "k" or "s." This is the number-one beginner fix.
• č is the "church" sound, and that sound is never spelled ch in Czech.
• The háček turns the "ts/ds" sounds into "ch/j": c→č, dz→dž.
• dz [ds in roads] and dž [j in judge] are the voiced, rarer partners; dž lives in loanwords, dz mostly at morpheme boundaries (podzim).
• Priority: master c and č; just recognise dz and dž.