This is the 1564th most frequent Spanish word.
boca
Mouth.
Here, 'boca' refers to the literal anatomical feature where teeth are located and the action is performed.
Me cepillo los dientes en la boca cada mañana.
I brush the teeth in the mouth every morning.
In this sentence, 'boca' metaphorically refers to the opening or entrance of the river as it connects to the sea.
La boca del río desemboca en el mar.
The mouth of the river flows into the sea.
In this context, 'boca' symbolizes the source of spoken communication or verbal expression.