「費盡心思」

(pos:動詞)
<explanation>
yue:為咗一樣嘢付出全副心機，全部投入
eng:to exhaust all mental efforts
<eg>
yue:佢費盡心思，幾經辛苦終於寫完本書。 (keoi5 fai3 zeon6 sam1 si1, gei2 ging1 san1 fu2 zung1 jyu1 se2 jyun4 bun2 syu1.)
eng:He spent all his efforts and finally finished this book.