This is a concern since someone could easily take an ibuprofen for a bad headache without realizing that it could seriously upset their fluid balance.

Almost any story by Hans Andersen seriously upset me.

Is mulling over, or indecision, apt to seriously upset the other?

Although doing little for his own situation, it would seriously upset any possible US actions from that direction.

He prodded the two sides by warning that a strike could seriously upset the nation's economy.

"You can't tell me you are seriously upset by it."

The delays seriously upset the original timetable, and it was clear by 1952 that even the "low tech" F-102 would not be able to meet the 1954 deadline.

Any change would seriously upset the balance of the agreement which the Council has agreed upon and would be doomed to fail.

In practice, however, operational factors seriously upset them, to the point that pinpoint bombing using the Norden was eventually abandoned.

A 12-day BA strike over Easter (say) could seriously upset a million people with pre-bought tickets.