secure (adj.) Look up secure at Dictionary.com
1530s, "without care," from Latin securus "without care, safe," from *se cura, from se "free from" (see secret) + cura "care" (see cure). Meaning "firmly fixed" (of material things) is from 1841, on notion of "affording grounds for confidence." Related: Securely.
secure (v.) Look up secure at Dictionary.com
1590s; see secure (adj.). Related: Secured; securing.