improficient

disorganized faulty feeble incompetent ineffective ineffectual inept sloppy weak

can't hack it careless extravagant half-baked improvident incapable inefficacious inexpert not cut out for prodigal shooting blanks slack slipshod slovenly unfit unprepared unqualified unskilled unskillful untrained

able capable competent dexterous effective fit neat skillful sound strong tidy

efficient expert useful

can't hack it careless disorganized extravagant faulty feeble half-baked improvident inapt incapable incompetent ineffective ineffectual inefficacious inept inexpert not cut out for prodigal shooting blanks slack slipshod sloppy slovenly unfit unprepared unqualified unskilled unskillful untrained weak