알랭이 결정을 내렸다.

English Translation

Alain made a decision.

내렸다: made (past tense of the verb 내리다, which means "to make" or "to come to a decision")

The verb 내리다 has multiple meanings depending on the context. Here are some alternative meanings of 내렸다:

To descend or come down:
    계단을 내려갔다. (He came down the stairs.)
    비행기가 착륙하여 지면에 내렸다. (The airplane landed and touched the ground.)

To take off (clothing) or remove:
    모자를 내리다. (To take off a hat.)
    신발을 내리다. (To take off shoes.)

To issue or make (a decision, announcement, order, etc.):
    판결을 내리다. (To make a judgment.)
    통고를 내리다. (To issue a notice.)

To lower or reduce (volume, temperature, etc.):
    소리를 내리다. (To lower the volume.)
    온도를 내리다. (To lower the temperature.)