secure
se-cure
adjective
Safe from threat; protected.
"The building is secure against intruders."
verb
Obtain (something), especially with effort.
"She managed to secure a place at university."
verb
Fasten or fix firmly.
"Secure the rope to the post."
Thesaurus
Synonyms: fix, fasten, plug, stop up, good, sound, safe, dependable, batten, batten down, sure, fail-safe