xià​dìng​jué​xīn

to be determined

下定决心 下定決心 xià​dìng//jué​xīn
to be determined verb + noun
to make a firm resolution; to resolve to do something

He was determined to win her heart.

Frequency

Movie subtitles
3.76 per million appears in 2% of films
Written text
4.25 per million

Sources