In a manner based on or involving discretion; according to one's own judgment or authority to decide.
From 'discretionary' (the more common form) plus the adverbial suffix '-ly,' though 'discretionally' is more standard. Both forms derive from 'discretion.'
This word is so awkward that most careful writers avoid it—'discretionary' is usually used as an adjective ('discretionary spending'), and 'discreetly' handles the adverbial sense, making 'discretionarily' almost completely obsolete despite being technically correct.
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