unpersuasive

baseless false feeble frivolous groundless lame thin

poor trifling

assailable contemptible controvertible fallacious illogical improbable inadequate inane inconceivable incredible inept puerile shallow superficial transparent trivial unbelievable ungrounded unreasonable unsatisfactory unsubstantial weak weakly wishful

solid strong

convincing firm plausible reasonable serious sturdy substantial

feeble flimsy ineffective weak

faltering poor thin

faulty flabby inadequate inefficient insufficient unconvincing unpleasing unsatisfactory unsuitable

convincing

effective persuasive strong

satisfactory

flat flimsy meager poor shallow skimpy sparse thick transparent

diluted lame scant scattered slight stretched

feeble implausible improbable inadequate inconceivable incredible insubstantial insufficient questionable scanty scarce sketchy superficial unbelievable unconvincing unsubstantial untenable vapid weak-kneed

adequate full intelligent reasonable strong substantial sufficient

concentrated

dense efficient fat heavy inflated obese solid undiluted