xià​dìng​jué​xīn

resolve

下定决心 (下定決心) xià​dìng​jué​xīn
resolve verb
to make a firm resolution

He finally made up his mind to get up an hour earlier every day starting next week to practice English.

Frequency

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

Sources

Definitions
CC-CEDICT