1. Prickly bushy Eurasian plant; a troublesome weed in central and western United States
   - Russian thistle, Russian tumbleweed, tumbleweed, Salsola kali tenuifolia

Type of: bush, shrub

• unfazed
• unfearing
• unfeasibility
• unfeasible
• unfeathered
• unfed
• unfeeling
• unfeelingly
• unfeelingness
• unfeigned
• unfeignedly
• unfeminine
• unfenced
• unfermented
• unfertile
• unfertilised
• unfertilized
• unfetter
• unfettered
• unfilial
• unfilled
• unfilmed
• unfinished
• unfinished business
• unfirm