1. Without intellectual involvement
   "all day long, he mindlessly filled out forms" 
2. In an unreasonably senseless manner
   "these temples were mindlessly destroyed by the Red Guards"
   - senselessly

See also: mindless

• terrain intelligence
• Terramycin
• terrane
• Terrapene
• Terrapene ornata
• terrapin
• terraqueous
• terrarium
• terrasse
• terrazzo
• Terre Adelie
• terrene
• terreplein
• terrestrial
• terrestrial dynamical time
• terrestrial guidance
• terrestrial planet
• terrestrial time
• terrestrially
• terret
• terrible
• terribleness
• terribly
• terrier
• Terrietia