noun
mental preparation; anticipation
Refers to preparing one's mind or heart for something, often with a sense of resolve or readiness. Slightly formal and literary.
彼は試験に向けて心組みを整えた。
He prepared himself mentally for the exam.
心組みができていないと、本番で慌てる。
If you aren't mentally prepared, you'll panic when it's time to perform.
Compound of 心 (こころ, 'heart, mind') and 組み (くみ, continuative form of 組む 'to assemble, plan'). The exact historical derivation is uncertain, but the word likely developed from the idea of 'putting one's mind in order'.