To be honest, looking in a dictionary is one of the WORST ways of approaching phrasal verbs. A simple translation into Portuguese will not help you understand how phrasal verbs fit into sentences or explain what context it's appropriate to use them in. Try not to use dictionaries - they really aren't very helpful. Nor is there any trick, I'm afraid. Unlike Latin-based words which can be broken down into roots, there is no use trying to work out what 'up' or 'in' actually means when used as part of a phrasal verb. The only way you can really get a thorough understanding of phrasal verbs is the way that we native speakers do - by exposure to colloquial language in natural contexts. You need to read informal texts, watch TV, watch movies, listen to music and try to get a feel for exactly how these expressions fit into our daily lives.

You understand the meaning from the context. Unfortunately, most dictionaries and textbooks don't give you enough understanding of the context behind phrasal verbs.

Hello, I have already seen a book containing only phrasal verbs and their basic meanings with translations into French. Very useful to me and easy to find almost any phrasal verb I looked for. Such a book may exist in your country bookstores or on the Internet.