开绿灯

Traditional form:

開綠燈

Pinyin (reading):

kāilüdēng

Definitions:

• to give the green light
• to give the go-ahead

Characters:

• 开 - to open; to start, to initiate, to begin
• 绿 - green; chlorine
• 灯 - lamp, lantern, light

Traditional characters:

• 開 - to open; to start, to initiate, to begin
• 綠 - green; chlorine
• 燈 - lamp, lantern, light