unskillful

No man could ascend it except at the southeast corner, and at that place a ladder or a rope was needed by the unskillful.

They represented him as an unfaithful, or unskillful laborer in the gospel, and as one who was not a subject of divine grace.

People unused to the world have babbling countenances, and are unskillful enough to show what they have sense enough not to tell.

As to Guano, it has not paid me; but that may be the fault of careless or unskillful application.