noun
the state or quality of being hesitant or uncertain
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The scientist approached the new theory with tentativeness, carefully considering all possible outcomes before drawing any conclusions.
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She showed a bit of tentativeness when trying out the new dance move, but eventually got the hang of it.
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His tentativeness in asking her out on a date was endearing, showing his nervousness and shyness.
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The artist painted with a tentativeness that added a sense of mystery and intrigue to the final piece.