1. In an unattainable manner or to an unattainable degree
   - unattainably

See also: unachievable

• retool
• retort
• retouch
• retrace
• retract
• retractable
• retracted
• retractile
• retraction
• retractor
• retrain
• retraining
• retral
• retranslate
• retransmit
• retread
• retreat
• retreatant
• retreated
• retrench
• retrenchment
• retrial
• retribution
• retributive
• retributory