Inexpert
/ɪnˈekspɜːrt/
Definition 1 of 1
Pro Tip 1/3Context Matters
Use 'inexpert' to describe lack of skill in a specific situation, not as a personality trait. 
Her inexpert attempt at baking resulted in a flat cake.
Pro Tip 2/3Negative Connotation
'Inexpert' implies a negative outcome caused by lack of skill. 
The inexpert restoration destroyed the antique's value.
Pro Tip 3/3Specific Tasks
Use 'inexpert' for concrete tasks or actions rather than abstract concepts. 
His inexpert wiring of the house led to a short circuit.