second thought

Or second-thought

noun

1. Often second thoughts. reservation about a previous action, position, decision, judgment, or the like.

   He had second thoughts about his decision.

second thought

noun

1. (usually plural) a revised opinion or idea on a matter already considered

Word History and Origins

Origin of second thought¹

First recorded in 1625–35

Idioms and Phrases

Idioms

1. on second thought, after reconsideration.

   On second thought, I don't think I'll go.

Example Sentences

Even when a group of men stare at you—beers clutched in hands, no idea why you’re shrieking in joy over carving the circumference of a tiny pool—you won’t give it a second thought.

Read more on The Wall Street Journal

The message was placed on social media, she said, to help connect with residents who might have second thoughts about contacting police because of the immigration raids.

Read more on Los Angeles Times

If only life itself were that simple, for activities many people undertake with barely a second thought - shopping for example - can lead to her taking fairly unusual measures.

Read more on BBC

Then: “On second thought, I changed my mind.”

Read more on Los Angeles Times

She bought a $350 VIP ticket a month ago but had second thoughts once the ICE raids began.

Read more on Los Angeles Times