1. In a harmfully insidious manner
   - insidiously 
2. In a noxiously baneful way
   - banefully

See also: pernicious

• Trotsky
• Trotskyism
• Trotskyist
• Trotskyite
• trotter
• trotting horse
• trou-de-loup
• troubadour
• trouble
• trouble and strife
• trouble oneself
• trouble spot
• trouble-free
• troubled
• troublemaker
• troubler
• troubleshoot
• troubleshooter
• troublesome
• troublesomeness
• troubling
• troublous
• trough
• trounce
• trouncing