This is the 9218th most frequent Portuguese word.
cantou
"Sang" (past tense of "sing").
In this sentence, 'cantou' is the past tense (pretérito perfeito) of the verb 'cantar' (to sing), indicating an action completed in the past.
Ela cantou na festa ontem.
She sang at the party yesterday.
Here, 'cantou' is used figuratively as the past tense of 'cantar', highlighting a habitual past action with emphasis.
Ele sempre cantou muito bem.
He has always sung very well.
In this instance, 'cantou' directly describes the action of singing a particular song during a specific event in the past.