1. to behave or proceed without care, attention, or consideration for consequences
He acted heedlessly when he decided to invest all his savings without research.
Ele agiu imprudentemente quando decidiu investir todas as suas economias sem pesquisa.
2. to move forward recklessly, ignoring warnings or potential dangers
The driver acted heedlessly by speeding through the school zone.
O motorista agiu imprudentemente ao dirigir em alta velocidade pela zona escolar.