easily upset

In spite of this, however, one of these boats is very easily upset, unless a person steps in very cautiously.

"You seem very easily upset nowadays," I said shortly, quite ready to quarrel if needs be.

One has to lie down all the time they are in motion, as a slight movement would easily upset them.

The arguments he used to them were repeated to the sailor, Bill's brother; and by him were easily upset with a few words.

Mrs. Susanna Brackett, however, was of a temperament less easily upset.