This is the 3674th most frequent Portuguese word.
tratar
"Tratar" means "to deal with, handle, treat, or address."
In this sentence, 'tratar' is used in the sense of 'dealing with' or 'addressing' a matter.
Eu preciso tratar deste documento agora.
I need to deal with this document now.
Here, 'tratar' is used to denote the manner in which one behaves towards others, or 'treat'.
Devemos tratar uns aos outros com respeito.
We must treat each other with respect.
In this instance, 'tratar' refers to seeking professional attention or curing a condition or problem for the subject.