This is the 9th most frequent French word.
est
"Est" means "is" in English.
Here, 'est' serves as the linking verb in the present tense, associating the subject 'La porte' ('The door') with the adjective 'ouverte' ('open').
La porte est ouverte.
The door is open.
In this sentence, 'est' links the subject 'il' ('he') to the adjective 'content' ('happy'), forming the present tense statement.
Aujourd'hui, il est content.
Today, he is happy.
In this sentence, 'est' is the third-person singular conjugation of the verb 'être', meaning 'to be'. It connects the subject 'Il' ('He') to the predicate 'un ingénieur talentueux' ('a talented engineer').