| cocksure | (adjective) marked by excessive confidence | Synonyms: overconfident, positive |
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| footsure | (adjective) not liable to stumble or fall | Synonyms: sure-footed, surefooted |
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| sure | (adjective) having or feeling no doubt or uncertainty; confident and assured | Synonyms: certain |
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| (adjective) certain to occur; destined or inevitable | Synonyms: certain |
| (adjective) exercising or taking care great enough to bring assurance | Synonyms: certain |
| (adjective) reliable in operation or effect | Synonyms: certain |
| (adjective) physically secure or dependable | - |
| (adjective) certain not to fail | - |
| (adjective) infallible or unfailing | - |
| (adjective) (of persons) worthy of trust or confidence | Synonyms: trusted |
| (adjective) impossible to doubt or dispute | Synonyms: indisputable |
| unsure | (adjective) lacking or indicating lack of confidence or assurance | Synonyms: incertain, uncertain |
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| (adjective) lacking self-confidence | Synonyms: diffident, shy, timid |