The Cedilla (Ç)

The little hook under the C — ç, the cedilha — solves one problem: how to write the [s] sound with the letter C in front of the vowels a, o, u, where a plain C would be read as [k]. That is its entire job, and once you see the logic, you will never again wonder whether a word needs ç or not. This page gives you the rule, the patterns where ç clusters (-ção, -ança), and the one place it surprises learners: conjugation.

The one rule: ç = [s] before a, o, u

The letter C has two pronunciations in Portuguese, decided entirely by the next vowel:

• before e, i → C is "soft," pronounced [s]: cebola (onion), cidade (city), cinema;
• before a, o, u → C is "hard," pronounced [k]: casa (house), copo (cup), cuca.

So how do you write the [s] sound followed by a, o, u? You cannot use a plain C — that would be read [k]. The solution is the cedilha: ç is read [s] before a, o, u.

Ç is NEVER used before e or i

This is the rule learners most often break, usually by over-applying the cedilha. Because C is already [s] before e and i, the cedilha would be redundant — and it is simply wrong. You never write çe or çi.

So if you ever feel tempted to write çe or çi, stop: the plain c already does the job. The forms çe, çi do not exist in Portuguese.

Ç never starts a word

A second hard constraint: no Portuguese word begins with ç. The cedilla always sits in the middle or, at most, between recognizable parts of a word — never in initial position. Words that start with the [s] sound before a/o/u use s instead (sapo, sopa, suco), and words starting with soft-c use plain c before e/i (cedo, cinema).

Where ç clusters: the common endings

The cedilha is extremely frequent in a few highly productive suffixes. Recognizing them lets you spell hundreds of words correctly at once:

The conjugation trap: ç drops before e

Here is where the cedilla behaves "irregularly" — except it is not irregular at all once you remember the core rule. Verbs whose stem ends in ç (like começar, dançar, abraçar) keep the ç only as long as the next letter is a, o, u. The moment a verb ending puts an e after the stem, the ç must become a plain c, because ce is already [s] and a çe would be illegal.

Look at começar ("to begin"):

The mirror image also exists: verbs in -cer like conhecer and parecer have a plain c before e/i, but switch to ç before a/o in the present subjunctive and the eu present — conheço, conheça — to keep the [s] sound. So the spelling chases the sound: ç before a/o/u, plain c before e/i, always.

A note for English and Spanish speakers

English has no cedilla at all (outside borrowings like façade), so the mark itself feels exotic — but the underlying idea is one English shares: the letter C is "soft" before E/I and "hard" before A/O/U (cent vs. cat). Portuguese simply gives you a tool, ç, to write a soft C in hard-vowel territory.

Spanish speakers have a false friend here: Spanish abolished the cedilla centuries ago and uses z where Portuguese uses ç (Spanish plaza, taza, brazo vs. Portuguese praça, taça, braço). So a Spanish speaker's instinct to write z must be retrained to ç in these words.

Common Mistakes

Key takeaways

• The cedilla makes c = [s] before the hard vowels a, o, u (caça, moço, açúcar).
• It is never used before e, i — there, plain c is already [s] (cidade, cebola).
• Ç never starts a word; word-initial [s] before a/o/u uses s (sapo, sopa).
• It clusters in the suffixes -ção, -ança, -ença — and English "-tion" maps reliably to -ção.
• In conjugation the ç drops to plain c before e (começar → comece, abraço → abrace) and c becomes ç before a/o (conhecer → conheço, conheça) — the sound stays [s], only the spelling swaps.
• Spanish uses z where Portuguese uses ç (plaza → praça).