gǔ​gàn HSK7

backbone

骨干 (骨幹) gǔ​gàn
backbone noun
the mainstay, core member, or essential part of an organization or group

He is the backbone of our team's business operations.

diaphysis noun
the central part or shaft of a long bone

From this X-ray, it is clearly visible that there is a crack in the shaft of his left leg bone.

Frequency

Movie subtitles
0.390 per million appears in 0% of films
Written text
19.2 per million

Details

HSK 2.0
Level 6
HSK 3.0
Level 7

Sources

Definitions
CC-CEDICT