jí​zhì

ultimate

极致 (極致) jí​zhì
ultimate adjective
reaching the maximum degree; extreme or superlative

Pursuing peak performance is the core philosophy of the brand.

peak noun
the highest point, state, or pinnacle of achievement

His artistic accomplishments have reached the ultimate level.

Frequency

Movie subtitles
1.70 per million appears in 1% of films
Written text
7.68 per million

Sources

Definitions
CC-CEDICT