sure

Being sure has to do with being certain, convinced, trustworthy, or dependable. You can trust a sure thing.

Besides being a synonym for yes, sure has to do with lots of kinds of dependability. If you have a sure eye, then you have good aim, maybe with shooting a basketball or throwing darts. If you're sure of yourself, you're confident. A sure thing or sure bet is something almost certain to happen. If you're 100% convinced of something, you're sure of it.

PRIMARY MEANINGS OF: sure

1
adjadv
having or feeling no doubt or uncertainty; confident and assured
definitely or positively (`sure' is sometimes used informally for `surely')
2
adj
reliable in operation or effect
3
adj
exercising or taking care great enough to bring assurance
FULL DEFINITIONS OF: sure
1

adj having or feeling no doubt or uncertainty; confident and assured

“was very sure in his beliefs”
sure of her friends”
Synonyms:
certain
confident, convinced, positive
persuaded of; very sure
Antonyms:
incertain, uncertain, unsure
lacking or indicating lack of confidence or assurance
ambivalent
uncertain or unable to decide about what course to follow
doubtful, dubious
fraught with uncertainty or doubt
groping
acting with uncertainty or hesitance or lack of confidence
show more antonyms...

adj certain to occur; destined or inevitable

“sudden but sure regret”
“he is sure to win”
Synonyms:
certain
bound, destined
(usually followed by `to') governed by fate
doomed, fated
(usually followed by `to') determined by tragic fate
foreordained, predestinate, predestined
established or prearranged unalterably
in for
certain to get or have
predictable
capable of being foretold
Antonyms:
uncertain
not certain to occur; not inevitable
chancy, flukey, fluky, iffy
subject to accident or chance or change
contingent
uncertain because of uncontrollable circumstances
up in the air
not yet determined
unpredictable
not capable of being foretold
show more antonyms...

adj impossible to doubt or dispute

Synonyms:
indisputable
certain
established beyond doubt or question; definitely known

adv definitely or positively (`sure' is sometimes used informally for `surely')

“they thought he had been killed sure enough”
“he'll win sure as shooting”
“they sure smell good”
sure he'll come”
Synonyms:
certainly, for certain, for sure, sure as shooting, sure enough, surely
2

adj reliable in operation or effect

“a sure way to distinguish the two”
“wood dust is a sure sign of termites”
Synonyms:
certain
dependable, reliable
worthy of reliance or trust

adj infallible or unfailing

“a sure (or true) sign of one's commitment”
Synonyms
true
consistent with fact or reality; not false

adj certain not to fail

“a sure hand on the throttle”
Synonyms
steady
not subject to change or variation especially in behavior

adj (of persons) worthy of trust or confidence

“a sure (or trusted) friend”
Synonyms:
trusted
trustworthy, trusty
worthy of trust or belief

adj physically secure or dependable

“a sure footing”
“was on sure ground”
Synonyms
secure
free from danger or risk
3

adj exercising or taking care great enough to bring assurance

“be sure to lock the doors”
Synonyms:
certain
careful
exercising caution or showing care or attention
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