alterar

Senses

1. 1.

   to alter, to change, to modify

   to make something different; to modify

2. 2.

   to upset, to disturb, to agitate

   to cause someone to become nervous, angry, or emotionally disturbed

3. 3.

   to falsify, to tamper with

   to change something in a fraudulent or unauthorized way

Examples

• "Vou alterar o horário da reunião para amanhã."

  I'm going to change the meeting time to tomorrow.

• "Não se altere, está tudo sob controle."

  Don't get upset, everything is under control.

• "Ele alterou os dados do documento sem autorização."

  He tampered with the document data without authorization.

Usage

Common verb in both formal and informal contexts. When reflexive (alterar-se), it typically means "to get upset/agitated." Often collocates with: alterar dados (change data), alterar planos (change plans), alterar o humor (affect one's mood). The pronominal form "se alterar" is very common in everyday speech meaning "to get worked up."