1. Learn additional skills 
2. Teach someone additional skills, especially as an alternative to redundancy

Derived forms: upskilling

• reaching
• reacquaint
• reacquired stock
• react
• reactance
• reactant
• reaction
• reaction engine
• reaction formation
• reaction propulsion
• reaction time
• reaction turbine
• reaction-propulsion engine
• reactionary
• reactionism
• reactionist
• reactivate
• reactive
• reactive depression
• reactive schizophrenia
• reactivity
• reactor
• read
• read between the lines
• Read method