Le genre par les suffixes II (-age/-eau/-isme…)

Unité GR-08 · campagne 3 · les terminaisons masculines et leurs pièges.

Half of the gender system is still unguarded. GR-07 taught you to read the feminine endings — -tion, -té, -ée — straight off the end of the word, but a B2 essay leans just as heavily on nouns like voyage, niveau and gouvernement, where a guessed article fossilizes fastest precisely because the guess so often feels safe. This unit completes the suffix method with the masculine battery: four endings that predict le with high reliability, and the short closed list of famous feminines that break them.

Masculine, with high reliability:

• -age — le voyage, le paysage, le message, le courage
• -eau — le bureau, le tableau, le niveau, le cadeau
• -isme — l'optimisme, le réalisme, le tourisme (no exceptions worth learning — -isme is the safest bet in the whole gender system)
• -ment — le gouvernement, le changement, le comportement

The famous feminines hiding in masculine clothes:

1. In la plage, la page, la cage, l'image, la nage, the -age is not the suffix at all — it belongs to the word's root. No suffix, no prediction: these are feminine.
2. L'eau and la peau are feminine despite the -eau ending — two words, endlessly recycled in exams precisely because the rule says otherwise.

Notice the shape of this pillar's logic, the same as the article units: a strong rule, then a short closed list of exceptions you learn as words, not as grammar. Rule plus list beats intuition every time — Russian gender intuitions transfer just often enough to feel trustworthy, which is exactly why they fossilize.

The items below alternate clean suffix predictions with the plage / image / eau / peau traps until the closed list is truly closed.

Going further

Why the rule exists. The masculine suffixes are reliable for a historical reason: -age and -ment come from Latin neuters (-aticum, -mentum), and when French lost the neuter, most Latin neuters became masculine. -isme comes from Greek -ismos, masculine already. A word whose -age is part of its root (plage, page, image) never had the suffix, so it never got its gender.

Minimal pairs. One change between the two sentences, and what it does:

The errors to watch.

From Russian and English. Russian gender sometimes happens to match — вода / l'eau, кожа / la peau, both feminine — and that is exactly the danger: it matches often enough to be trusted. Пляж is masculine, la plage feminine; путешествие is neuter, le voyage masculine. Let the French ending vote, never the Russian noun. English, with no gender, leaves you to learn the article with every noun — which is the right habit here too.

The complete rule. -age, -eau, -isme, -ment: masculine. The exceptions are words where the ending is root, not suffix — la plage, la page, la cage, l'image, la nage, la rage; l'eau, la peau; la jument (a mare, no -ment suffix). -isme has no exception a learner meets.

The article is where a gender shows — the families are on Qu'est-ce qu'un déterminant ? Le sens de chaque famille.

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