1. (adj) secure, unafraid, untroubled
free from fear or doubt; easy in mind
Synonyms: unafraid(p), inviolable, secure, dependable, safe, untroubled, strong, unafraid, unattackable, unassailable, fearless, impregnable, good
Antonyms: insecure, overanxious, unsound, unsafe, shaky, unassured, vulnerable, precarious, unguaranteed, unsecured
2. (adj) secure
free from danger or risk
Synonyms: inviolable, dependable, safe, untroubled, strong, unafraid, unattackable, unassailable, impregnable, good
Antonyms: unguaranteed, insecure, unsound, unassured, vulnerable, unsecured, shaky, unsafe, precarious, overanxious
3. (adj) secure
not likely to fail or give way
Synonyms: inviolable, dependable, safe, untroubled, strong, unafraid, unattackable, unassailable, impregnable, good
Antonyms: unguaranteed, unassured, insecure, precarious, overanxious, unsafe, unsound, shaky, vulnerable, unsecured
4. (adj) impregnable, inviolable, secure, strong, unassailable, unattackable
immune to attack; incapable of being tampered with
Synonyms: conceptive, potent, watertight, dependable, safe, absolute, substantial, inviolate, untroubled, inviolable, unshakable, untouchable, warm, good, stiff, inexpugnable, unafraid, infrangible, unattackable, unassailable, bulletproof, firm, solid, strong, sacrosanct, hard, impregnable, secure
Antonyms: unguaranteed, insecure, vulnerable, unassured, unsecured, shaky, unsound, unsafe, precarious, overanxious
5. (verb) dependable, good, safe, secure
financially sound
Synonyms: dear, safe(p), good, right, in effect(p), unspoiled, effective, skillful, sound, serious, secure, true(p), upright, untroubled, steady-going, inviolable, salutary, in force(p), reliable, skilful, practiced, dependable, estimable, rock-steady, expert, just, unafraid, beneficial, unassailable, proficient, full, honest, respectable, undecomposed, unspoilt, ripe, impregnable, safe, adept, honorable, strong, well(p), near, unattackable
Antonyms: insecure, unsecured, vulnerable, unguaranteed, precarious, unsafe, overanxious, shaky, unassured, unsound
6. (verb) procure, secure
get by special effort
Synonyms: fasten, plug, stop up, batten down, insure, pander, procure, guarantee, ensure, secure, assure, batten, fix, pimp
Antonyms: unassured, precarious, unsound, vulnerable, shaky, insecure, overanxious, unsafe, unguaranteed, unsecured
7. (verb) fasten, fix, secure
cause to be firmly attached
Synonyms: batten down, furbish up, desexualise, sterilize, ready, prepare, get, set up, stop up, cook, insure, secure, guarantee, sterilise, gear up, procure, mend, ensure, make, fasten, fixate, assure, bushel, desexualize, tighten, define, specify, plug, determine, desex, deposit, touch on, repair, pay back, batten, posit, unsex, situate, limit, restore, set, fix, pay off, doctor
Antonyms: unassured, unsecured, precarious, unguaranteed, overanxious, unsafe, shaky, insecure, unsound, vulnerable
8. (verb) secure
assure payment of
Synonyms: fasten, plug, stop up, batten down, procure, guarantee, ensure, insure, assure, batten, fix
Antonyms: insecure, unguaranteed, unsafe, precarious, unassured, overanxious, vulnerable, unsecured, shaky, unsound
9. (verb) guarantee, ensure, insure, assure, secure
make certain of
Synonyms: ensure, reassure, ascertain, batten, control, plug, stop up, warrant, batten down, assure, guarantee, underwrite, fix, cover, promise, fasten, check, see to it, undertake, procure, insure, tell, vouch, secure, see
Antonyms: unguaranteed, overanxious, unassured, unsecured, vulnerable, insecure, unsafe, unsound, precarious, shaky
10. (verb) plug, stop up, secure
fill or close tightly with or as if with a plug
Synonyms: fasten, plug, stop up, plug away, batten down, fix, procure, guarantee, ensure, insure, assure, batten, punch, secure
Antonyms: overanxious, precarious, unguaranteed, insecure, unsafe, shaky, vulnerable, unsound, unassured, unsecured
11. (verb) batten, batten down, secure
furnish with battens
Synonyms: fasten, plug, stop up, batten down, procure, guarantee, ensure, insure, assure, batten, fix, secure
Antonyms: insecure, shaky, vulnerable, unguaranteed, overanxious, unassured, unsound, unsafe, unsecured, precarious
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Synonyms and Antonyms of secure 
