The verb ter (to have) is so important in Portuguese that it’s used to form other verbs; these verbs are conjugated in the same way as the verb they originate from – since ter is a bit irregular, you should drill those conjugations before applying them to these new verbs.
So, here’s a list of 7 essential verbs derived from ter (in alphabetical order) to enhance your vocabulary:
1. abster-se
Meaning: to abstain, to refrain from doing something
Sentence: Eu abstive-me de votar nas últimas eleições. I abstained from voting in the last election.
The European Portuguese Experience 