Adjectives with Possessives and Demonstratives

Danish adjectives come in two shapes: the strong (indefinite) form, which agrees with the noun's gender and number, and the weak (definite) form, which is just the base adjective plus -e and never changes. Learners usually meet the weak -e form attached to the definite article — den store bil, det store hus — and quietly conclude that -e is "the article's form." That conclusion is the bug. The -e form is triggered by definiteness itself, not by the article specifically, and a possessive, a demonstrative, or a genitive makes a phrase just as definite as den does. This page unifies all of those triggers into a single rule.

The strong form: indefinite, agreeing

Start with what the weak form is reacting against. With en/et or no article at all, the adjective takes its strong form and agrees with the noun:

The full mechanics of this agreement live on the indefinite agreement page. The point here is the contrast: the moment the phrase becomes definite, all of that agreement collapses into a single invariant -e.

The weak form: any definiteness marker → -e

Here is the rule that ends the guessing:

Trigger 1: the definite article

This is the familiar one, and it brings the double definiteness construction with it — the article den/det plus the adjective plus a noun that takes no ending:

Trigger 2: demonstratives

A demonstrative (denne "this", dette "this" neuter, disse "these", or den/det/de used demonstratively) is definite by nature, so the adjective goes weak. Crucially, no extra article is needed — the demonstrative already does the definiteness work.

Trigger 3: possessives

This is the one English speakers trip on. A possessive — min, din, hans, hendes, vores, jeres, deres — makes the phrase definite, so the adjective takes the -e form. There is no agreement on the adjective even though the possessive itself agrees with the noun's gender.

Notice what is happening: mit carries the neuter marking (min → mit), and that is enough to make the phrase definite. The adjective is then freed from agreement entirely and just shows -e. Trying to also mark the adjective (mit gammelt hus) double-marks the neuter and is wrong.

Trigger 4: genitives

A genitive (a noun + -s, like Peters, Mettes, byens) is a possessive in disguise, so it triggers the weak form for exactly the same reason.

Why this works: definiteness, not the article

In English, the only definiteness signal that changes anything is the, and adjectives never inflect anyway, so an English speaker has no reason to expect a possessive to behave like an article. In Danish, the whole adjective system pivots on a single binary: is the noun phrase definite or indefinite? A definite phrase can be made definite by any of four routes, and all four land in the same place. Seeing min, denne, and Peters as members of the same family — "definiteness markers" — is what lets you stop guessing and just append -e.

One more consequence worth internalizing: because a possessive or genitive already supplies the definiteness, you do not add the article den/det. Den min store bil is wrong; min store bil is complete. The double-definite den ... -e pattern is only for the bare definite article, not for possessives or genitives.

Common Mistakes

Key takeaways

• The weak -e adjective form is triggered by definiteness, not by the article alone.
• Four triggers, one outcome: definite article (den/det), demonstrative (denne/dette), possessive (min/mit/dine), and genitive (Peters) all force base + -e.
• The weak form does not agree in gender or number — it is always just -e.
• A possessive or genitive supplies the definiteness by itself, so you do not add den/det: min store bil, not den min store bil.