a fundo

thoroughly

→ a
phrase Rare #42,915
thoroughly Often used with verbs meaning to study, examine, or know something; it can also mean “in depth.”
PO: Precisamos investigar o problema a fundo.
EN: We need to investigate the problem thoroughly.

Eu te conheço a fundo.

I know you inside and out.

De qualquer forma, é melhor voltar para examiná-la a fundo.

In any case, it's best to go back and examine it thoroughly.

— Ghost in the Shell: O Fantasma do Futuro (1995)

Ela havia estudado o assunto a fundo antes da apresentação.

She had studied the subject thoroughly before the presentation.

Quero ir um pouco mais a fundo.

I want to delve a little deeper.