Questions & Answers about Η προσαύξηση είναι γελοία.
Η is the feminine singular definite article, so here it means the.
It matches προσαύξηση, which is a feminine singular noun:
- η προσαύξηση = the increase / the raise / the surcharge, depending on context
Greek articles must agree with the noun in gender, number, and case.
Because προσαύξηση is simply a noun that belongs to the feminine gender in Greek. Grammatical gender is something you usually have to learn together with the noun.
A useful clue is the ending:
- many nouns ending in -ηση are feminine
So you learn it as:
- η προσαύξηση
That is why the article is η and the adjective later is also in the feminine form.