1. to deliberately or inadvertently encourage, promote, or create a state of doubt, lack of confidence, or unclear conditions
The government's vague statements foster uncertainty in the market.
As declarações vagas do governo fomentam incerteza no mercado.
2. to nurture or sustain conditions of ambiguity and doubt
Conflicting reports from the company foster uncertainty among investors.
Relatórios conflitantes da empresa fomentam incerteza entre os investidores.