Adjective - Bijvoeglijk naamwoord

Adjectives are words that qualify nouns. They express a particular quality of the noun. Colours, for example (geel, rood, zwart) can be adjectives, or words indicating dimensions (groot, lang, klein). Adjectives can also express more abstract qualities. For example: gezellig, interessant or aardig.

When adjectives are used before the noun, i.e. attributively, an –e is generally added to the base form of the adjective:

Hull heeft een kleine universiteit. Hull has a small university.
Alan is een aardige jongen. Alan is a nice guy.

However, if the noun it precedes is a common gender noun, and if that noun is indefinite, only the base form of the adjective is used:

Het jongetje draagt een geel jasje.
The boy is wearing a yellow jacket.