arch-enemy /ärch-enˈə-mi/

1. A chief enemy
2. Satan (also arch-felˈon, arch-fiendˈ, arch-foeˈ)

• tracheated
• tracheid
• tracheide
• tracheides
• tracheids
• uncircumscribed
• uncited
• uncivil
• uncivilised
• uncivilized
• uncivilly
• unclad
• unclaimed
• unclasp
• unclasped
• unclasping
• unclasps
• unclassed
• unclassical
• unclassifiable
• unclassified
• unclassy
• uncle
• unclean
• uncleaned