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)

• backboneless
• backbones
• backbreaker
• backbreakers
• backbreaking
• back burner
• back-burner
• back burners
• back-calculate
• back-calculated
• back-calculates
• back-calculating
• back-calculation
• backcast
• backcasting
• backcasts
• back catalogue
• back catalogues
• back-chain
• back channel
• back channels
• backchat
• backchats
• backchatted
• backchatting