Ineffectual

[Sarah]

Not producing the proper effect; without effect; inefficient;weak; useless; futile; unavailing; as, an ineffectual attempt; anineffectual expedient. Pope.The peony root has been much commended, . . . and yet has been bymany found ineffectual. Boyle.

[Hina Muqadas]

not skilled at achieving, or not able to produce, good results: