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envious; jealous
enviable (position, etc.)
友達の新しい車が羨ましいです。
I'm envious of my friend's new car.
彼女は毎日遊んでいて羨ましい。
I'm jealous that she gets to play every day.
海外旅行に行けて羨ましかった。
I was envious that you could go on an overseas trip.