portend
/pɔːˈtend/verb
with obj.
- be a sign or warning that (something, especially something momentous or calamitous) is likely to happen预示（重大或灾难事件）可能发生：
the eclipses portend some major events.
日食月食预示某些重大事件可能发生。
词源
late Middle English: from Latin portendere, based on pro-'forth'+tendere 'stretch'.