Unrealistic; not considering real-world circumstances or feasibility. Impractical or fanciful and unlikely to be realized.
その計画は予算や人員を無視していて非現実的だ。
That plan is unrealistic because it ignores the budget and manpower.
夢を見るのは大事だが、実行計画がなければ非現実的になりやすい。
It's important to dream, but without an execution plan it tends to be unrealistic.
彼の期待は少し非現実的で、調整が必要だ。
His expectations are a bit unrealistic and need adjustment.
非現実的なスケジュールではプロジェクトは失敗しやすい。
A project with an unrealistic schedule is likely to fail.