1. Taking place by degrees
   - gradational, graduated

See also: gradual

• IJssel
• IJssel river
• IJsselmeer
• ijtihad
• Ike
• ikebana
• Ikhanaton
• ikon
• il
• Il Duce
• ilama
• ilama tree
• ilang-ilang
• Ile-St-Louis
• ileac
• ileal artery
• ileitis
• ileocecal valve
• ileocolic artery
• ileocolic vein
• ileostomy
• Iles Comores
• Iles Marquises
• ileum
• ileus