Desire
Ambition, Applying
noun, verbal noun
Your intention for your hope is what you want. It's not just a hope. You have intention behind it. This is your desire. This is your ambition.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
この仕事を志望する動機は何ですか？
What is your motivation for applying for this job?