1. A path, course, or method whose validity, safety, legality, or wisdom is doubtful or open to doubt
Taking that questionable route through the dark alley is not advisable at night.
Pegar essa rota questionável pelo beco escuro não é aconselhável à noite.
2. A course of action whose appropriateness or effectiveness is uncertain or disputed
The company chose a questionable route by cutting corners on quality to save money.
A empresa escolheu uma rota questionável ao cortar gastos com qualidade para economizar dinheiro.