This is the 160th most frequent Portuguese word.
total
Complete; entire; absolute.
Here, 'total' is used as an adverb, colloquially summarizing or emphasizing the overall conclusion of events.
Total, a decisão ficou para a próxima reunião.
All in all, the decision was postponed to the next meeting.
Here, 'total' serves as an adjective describing the overall sum or amount inclusive of all components.
O valor total da compra foi de 150 reais.
The total value of the purchase was 150 reais.
In this sentence, 'total' modifies 'disinterest' as an adjective, emphasizing the complete or absolute nature of the lack of interest.