1. Not required or requested
   "uncalled-for suggestions" 
2. Unnecessary and unwarranted
   - gratuitous, needless

See also: unnecessary, unneeded, unwanted

• 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