Verb

(en verb)

To act or perform a second time; to do over again; to reenact.

to react''' a play; the same scenes were '''reacted at Rome

To return an impulse or impression; to resist the action of another body by an opposite force; as, every body reacts on the body that impels it from its natural state.

To act upon each other; to exercise a reciprocal or a reverse effect, as two or more chemical agents; to act in opposition.

Verb

(en verb)

To react inadequately.

*{{quote-news, year=2009, date=October 11, author=Conrad De Aenlle, title=When Emotions Move the Markets, work=New York Times citation

, passage=“Investors tend to underreact to positive fundamental change,” said Horacio Valeiras, chief investment officer of Nicholas-Applegate Capital Management. }}