This is the 4680th most frequent Portuguese word.
dificulta
"Hinders" or "makes difficult."
'Dificulta' is used here as a verb in the third-person singular present tense to describe the action of making traffic conditions more challenging.
A chuva dificulta o tráfego na cidade.
The rain complicates the traffic in the city.
Here, 'dificulta' indicates the obstacle posed by insufficient light to the activity of reading.
A falta de luz dificulta a leitura do livro.
The lack of light hinders reading the book.
In this case, 'dificulta' expresses the idea of making the process of language acquisition harder due to insufficient practice.