“This is a really great book. But you don’t have to take my word for it. Read it yourself and see.”

“I don’t like reading much, so I’ll just take your word for it.”

To take someone’s word is to believe something they say. If you don’t take their word for it, you have to see or experience it yourself before you will believe it. If you trust the person or just don’t feel like confirming their story, you can take their word for it.