green-light
UKUS
Definitions
v.
To give official approval for something to proceed
批准；放行；给…开绿灯
n.
Official permission to proceed
（准许进行的）批准；许可
Root Breakdown
Native Englishgreen + light (the 'signal lamp' sense) = the green traffic light that means 'go.' Used figuratively, to green-light a project is to give it the go-ahead, just as a green light lets cars move.
Root light still carries 58 more wordsExample Sentences
- 1.
The studio finally green-lighted the sequel after months of talks.
- 2.
We can't start building until the city gives us the green light.