expression, ichidan verb
prepare oneself for the worst; resolve oneself; steel one's resolve
Used when someone braces themselves for a difficult or unpleasant outcome, often with a sense of determination. Similar to 腹を括る (はらをくくる), but 覚悟を決める emphasizes mental preparation more than decisive action.
See also: 腹を括る
彼は失敗を覚悟を決めて、新しい事業に挑戦した。
He prepared himself for failure and took on the new business venture.
Before the surgery, the patient had to steel their resolve.