portend

那些乌云预示着即将到来的暴风雨。

Those dark clouds ___portend an approaching storm.

股价的突然大跌似乎预示着更大范围的市场崩溃。

The sudden drop in stock prices seemed to ___portend a broader market collapse.

持续的低烧可能预示着更严重的潜在疾病。

A persistent low-grade fever can ___portend a more serious underlying condition.