to become stricter with spending or policy
volverse más estricto con el gasto o la política (volverse mas estricto con el gasto o la politica)
"The central bank decided to tighten up on lending to reduce inflation."
"El banco central decidió ajustar los préstamos para reducir la inflación." (El banco central decidio ajustar los prestamos para reducir la inflacion)
to make a decision or agreement definite
to introduce changes gradually over time
to stop taking medicine
to make policies consistent with those of another country or...
to deal with and gradually overcome stress
to expand a company into new areas or markets