Definition of discretionable in English:
discretionable
adjective dɪˈskrɛʃənəbldɪˈskrɛʃ(ə)nəbl
rare Subject to discretion; left to one's own will or judgement; discretionary.
Origin
Mid 18th century; earliest use found in Gerard G. Beekman (1719–1797). From discretion + -able.