1. Deeply absorbed in thought
   - bemused, lost, preoccupied

See also: thoughtful

• reservedly
• reserves
• reservist
• reservoir
• reset
• reset button
• resettle
• resettled
• resettlement
• resew
• resh
• reshape
• reship
• reshipment
• reshoot
• Resht
• reshuffle
• reshuffling
• resiance
• resid
• reside
• residence
• residence hall
• residence time
• residency