Tenuous (adjective) کمزور، پتلا، نازک،باریک

very weak or slight.
Example: “the tenuous link between interest rates and investment”
Synonyms: slight, insubstantial, flimsy, negligible, weak, fragile, shaky, sketchy, doubtful, dubious
Antonyms: convincing, substantial, strong
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Discretionary (adjective) صوابدیدی

available for use at the discretion of the user.
Example: “there has been an increase in year-end discretionary bonuses”
Synonyms: optional, non-compulsory, voluntary, at one’s discretion, up to the individual, non-mandatory
Antonyms: compulsory, obligatory