1. Self-sacrificing or austere
   - hair-shirt

See also: hair shirt

• outlet box
• outlier
• outline
• outlined
• outlive
• outlook
• outlying
• outmaneuver
• outmanoeuvre
• outmarch
• outmatch
• outmode
• outmoded
• outmost
• outnumber
• outpace
• outpatient
• outperform
• outplay
• outpoint
• outport
• outpost
• outpour
• outpouring
• output