infest /in-festˈ/

1. To swarm over, cover or fill, in a troublesome, unpleasant or harmful way
2. To invade and live on or in as a parasite
3. To disturb or harass

1. Hostile
2. Troublesome

infestāˈtion noun

1. Attack, or the condition of being attacked, esp by parasites
2. Molestation (obsolete)

• it's a small world
• it says
• it says that
• it's early days
• it seems
• itself
• it's his call
• it's my funeral
• it stands to reason
• itsy-bitsy
• it's your call
• it's your funeral
• ITT
• itty-bitty
• ITU
• iTunes
• ITV
• it would seem
• -ity
• i.u.
• IU
• IUCD
• IUCN
• IUD
• -ium