- accountable: (adj) Responsible
- assiduous: (adj) Conscientious
- default: (n) The failure to fulfill an obligation
- feckless: (adj) Ineffective
- incumbent: (adj) Holding an office or position
- liability: (n) A handicap
- mandatory: (adj) Required
- negligence: (n) Lack of proper care or attention
- onerous: (adj) Difficult to bear
- remiss: (adj) Lax or careless