Looking up...
C'est un bon livre.
It's a good book.
Good, positive, or satisfactory in quality or character.
Il fait un bon travail.
He does good work.
C'est une bonne idée.
That's a good idea.
The feminine form is 'bonne'.
Effective or useful.
C'est un bon médicament.
It's an effective medicine.
Remember that 'bon' changes to 'bonne' when used with feminine nouns.
'Bon' is one of the most frequently used adjectives in French, so it's essential to master its usage.
From Old French 'bon', from Latin 'bonus' meaning 'good'.
The word 'bon' is commonly used to describe something positive or of good quality. It can be used as an adjective to describe people, things, or situations. The feminine form is 'bonne'.