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The Japanese word

凝らす

is pronounced
korasu | こらす
means
to devote, to apply, to strain, to rack
Examples:
その部屋は装飾を凝らしている。
sono heya wa sōshoku o korashi te iru.
The room is richly ornamented.
彼は息を凝らしてその光景を見つめていた。
kare wa iki o korashi te sono kōkei o mitsume te i ta.
He was watching the scene with breathless interest.
メアリさんは凝らししながら幽体離脱を経験しました。
meari san wa korashi shi nagara kasoke tai ridatsu o keiken shi mashi ta.
Mary had an out-of body experience while meditating.
そのキルトは本当によく技巧が凝らされていていいものですね。
sono kiruto wa hontōni yoku gikō ga korasa re te i te ī mono desu ne.
That quilt is really quite a piece of work with all its fine craftsmanship.
Examples sourced from tatoeba.org