spell trouble
US /spɛl ˈtrʌb.əl/
UK /spɛl ˈtrʌb.əl/

1.
帶來麻煩, 預示麻煩
to indicate that something bad is likely to happen
:
•
His constant tardiness could spell trouble for his job.
他經常遲到可能會給他的工作帶來麻煩。
•
The dark clouds on the horizon spell trouble for our picnic.
地平線上的烏雲預示著我們的野餐會有麻煩。