坚定不移

jiān dìng bù yí

unswerving; unshakeable

Character by character

坚jiān
firm

定dìng
fixed

不bù
not

移yí
move

我们将坚定不移地推进改革。

We will unswervingly press ahead with reform.

Tone: positive (praise).

Most often adverbial (坚定不移地 + verb); also 坚定不移的 + noun (决心, 信念).

Learn this in Lesson 102 · HSK 7–9: 读懂官方新闻 (Decoding the evening news)

A dialogue, a reading, word cards with audio and a drill that uses it, in Learn Chinese with Bao. This lesson is free.