This is the 5956th most frequent French word.
derrière
"Derrière" means "behind" or "rear" in English.
Here 'derrière' is used as a preposition to indicate the location of the book in relation to the table.
Le livre est derrière la table.
The book is behind the table.
In this sentence, 'derrière' serves as an adverb indicating the relative position of the action in relation to him.
Je me suis assis derrière lui dans la classe.
I sat behind him in the classroom.
Here 'derrière' is used metaphorically to suggest an abstract concept hiding behind the literal meaning of the words.