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

• undermine
• undermined
• underminer
• underminers
• undermines
• undermining
• underminings
• undermost
• up and running
• up-and-under
• Upanisad
• Upanishad
• upas
• upases
• upas-tree
• up at
• up a tree
• upbear
• upbearing
• upbears
• up-beat
• upbeat
• up-beats
• upbind
• upbinding