adjective / verb
secure
sih-KYOOR/sɪkjˈʊr/
Firmly protected against displacement or loss.
A sturdy padlock keeps the heavy wooden chest secure.

Etymology
Secure literally suggests being 'without care': untroubled because danger is absent. The firmly fixed sense extends this confidence to things whose stability or strength leaves no grounds for fear.
In context
Corby, who's been at the forefront of secure luxury for about five decades, is known for creating fortified environments.
More examples
- Check that the ladder is secure before climbing.
- She secures her bike to the rack with a lock.
- We secured the boxes with straps before the move.
Forms
secure · secures · secured · securing · more secure · most secure
securely adverb — In a firmly fixed or protected way.
security noun — Protection against danger, damage, or loss.