Determination
Resolution, Conviction
noun, verbal noun
When you decide with your heart you have true determination, unlike when you decide with your mind.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Just make sure you take note of the shortened つ. So, けつ goes to けっ.
ふじ山の上でプロポーズすると決心した。
I determined to propose on Mt. Fuji.
私の「ヒーローになる」という決心は強いです。
My determination to "become a hero" is strong.
大学で化学を学ぶ決心はつきましたか?
Have you found the resolve to study chemistry at university?