凝らす
こらす · korasu · JLPT N1 · noun
dressed ore
🔍 凝 = congeal: make your attention thicken and set firmly on one point (凝らす)
凝らす is the causative of 凝る (to congeal, stiffen). It means making your focus or effort solidify onto one spot, as when you peer into something or concentrate on a task.