This is the 592nd most frequent Korean word.
유일하게
"유일하게" means "uniquely" or "only."
Here, '유일하게' means 'as the only one' and emphasizes that he alone accomplished solving the problem.
그는 유일하게 이 문제를 풀었다.
He was the only one who solved this problem.
In this sentence, '유일하게' highlights exclusivity, stressing that no one other than 'you' displayed concern.
유일하게 나에게 관심을 가진 사람은 너야.
You are the only one who showed interest in me.
'유일하게' in this context indicates uniqueness, specifying that this is the sole location where the flower is found.