1. Lack of ability (especially mental ability) to do something 
2. Lacking the power to perform
   - unfitness

Derived forms: inabilities

Type of: cognition, knowledge, noesis, quality

Antonym: ability

• reactive depression
• reactive schizophrenia
• reactivity
• reactor
• read
• read between the lines
• Read method
• Read method of childbirth
• read-only file
• read-only memory
• read-only memory chip
• read-only storage
• read/write head
• read/write memory
• readability
• readable
• readably
• readapt
• readdress
• reader
• readership
• readily
• readiness
• reading
• reading assignment