Implant deeply, as in soil

• Take hold
• Establish firmly
• Plant deeply
• Attach securely
• Firmly fix eastern and northern itinerary during discussion
• Firmly establish
• Implant securely
• Put in firmly

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Enroot \En*root"\, v. t. To fix by the root; to fix fast; to implant deep. --Shak.

Wiktionary Word definitions in Wiktionary
vb. (context usually of a plant English) To take root.