Gullible [adjective]

We tend to think young children are simply more gullible due to their tender years.

You want to avoid the extremes of gullible optimism and fatalistic pessimism.

Phishing is an old technique used by online fraudsters to find people who are gullible and looking for an online lover.

Navarro and his team “appeared gullible” and there was no evidence that they even tried to negotiate a lower price, the House investigators found.

You see the name at every turn, and the gullible Americans bite, chew, and swallow.

Poor gullible Pekka immediately suspended himself on the chain above his porridge.

To my gullible apprehension, it seems eminently appropriate.

What moved his satiric vein was that they all had to be gulled—and were all gullible.

He knew that an unduly suspicious nature is as bad as a gullible one.

"I never thought you gullible," she denied, suddenly wistful.