overoptimistically

With excessive hope

In a manner that is too hopeful or confident about outcomes, beyond what circumstances warrant.

Someone who overoptimistically estimates a project timeline underestimates the obstacles.

We overoptimistically assumed the rain would stop by noon.

naivete

unrealistic

Lacking basis in reality

wishful thinking · Pollyanna · credulous · overconfident · presumptuous · cocksure · foolhardy · reckless · imprudent · hasty

idealism

utopian

Impractically perfect in conception

ambitious · aspirational · perfectionist · romantic · quixotic · idealistic · zealous · enthusiastic · bullish · sanguine

disappointment

letdown

Failure to satisfy expectations

disillusioned · dismayed · disenchanted · disheartened · unfulfilled · chagrined · discouraged · frustrated · dashed hopes · bubble burst

Opposites
outlook valence

overoptimisticallypessimistically

With negative expectations

gloomily · despairingly · cynically · fatalistically · bleakly

calibration to reality

overoptimisticallyrealistically

In a sensible manner

pragmatically · soberly · level-headedly · cautiously · sensibly

Family

optimistically, optimistic, optimism, optimist, optimists, optimal, optimum, optimize, optimized

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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G