1. Lacking professional skill or expertise
   "a very amateurish job"
   - amateur, inexpert, unskilled

See also: amateurishness, unprofessional

• air-cooled
• air-dried
• air-dry
• air-filled
• air-intake
• air-raid shelter
• air-slake
• air-sleeve
• air-to-air
• air-to-air missile
• air-to-ground
• air-to-ground missile
• air-to-surface
• air-to-surface missile
• airborne
• airborne patrol
• airborne transmission
• airbrake
• airbrush
• airburst
• airbus
• aircraft
• aircraft carrier
• aircraft engine
• aircraft landing