1. A challenging or arduous accomplishment; a hard-to-achieve task or exploit that requires significant effort, skill, or courage
Climbing Mount Everest is a difficult feat that only experienced mountaineers attempt.
Escalar o Monte Everest é uma façanha difícil que apenas alpinistas experientes tentam.
2. An impressive or remarkable achievement that is challenging to accomplish
Learning a new language as an adult is a difficult feat.
Aprender uma nova língua na idade adulta é uma façanha difícil.