deleterious /del-i-tēˈri-əs/

1. Harmful or destructive
2. Poisonous

deletēˈriously adverb

• jumping jacks
• jumping mice
• jumping mouse
• jumping-off place
• jumping-off places
• jumping plant lice
• jumping spider
• jumping spiders
• jump jet
• jump jets
• jump-jockey
• jump-jockeys
• jump leads
• jump off
• jump-off
• jump-offs
• jump on
• jump one's bail
• jump on the bandwagon
• jump out
• jump rope
• jump ropes
• jumps
• jump seat
• jump seats