1) Attach securely 2) Establish solidly 3) Firmly establish 4) Implant 5) Implant deeply 6) Implant firmly 7) Implant securely 8) Put in firmly 9) Take hold 10) To attach or place securely 11) To fix by the root 
• (v. t.) To fix by the root; to fix fast; to implant deep.
To fix by the root; to fix fast; to implant deep. ... (27 Oct 1998) ... 
En·root' transitive verb To fix by the root; to fix fast; to implant deep. Shak. 
to fix by the root. · to attach or place securely; implant deeply.