1. not suitable or qualified for a particular purpose, role, or activity
He was deemed unfit for military service due to health issues.
Ele foi considerado impróprio para o serviço militar devido a problemas de saúde.
2. lacking the necessary physical or mental condition for something
The bridge was declared unfit for heavy traffic.
A ponte foi declarada imprópria para tráfego pesado.
3. morally or legally inadequate for a position or responsibility
The judge ruled him unfit for custody of the children.
O juiz o declarou impróprio para a guarda das crianças.