This is the 2017th most frequent Portuguese word.
cair
"To fall."
In this sentence, 'cair' describes the action of the toy falling from a certain height to the ground, emphasizing the physical descent.
A criança deixou o brinquedo cair no chão.
The child let the toy fall to the ground.
Here, 'cair' is used metaphorically to express a reduction in the numerical value of the prices.
O preço dos produtos começou a cair devido à promoção.
The prices of the products started to drop due to the promotion.
In this context, 'cair' reflects the potential collapse or loss of physical balance caused by tiredness.