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lend support to (something)
1. To add information or details to something, especially to make it seem more credible or probable. Do you have any evidence that lends support to your assertion? We cannot do anything that will lend support to our opponents' allegations about us.
2. To provide assistance or approval to something. The president is lending support to the governor's re-election campaign. Your department will have responsibility, but the sales team will lend support to the project if needed.
lend credence to (something)
To make something seem more credible or probable, perhaps by providing additional information or details. He splashed mud all over his car and clothes to lend credence to his story about being in the mountains all weekend. We cannot do anything that will lend credence to our opponents' allegations about us.
give credence to (someone or something)
To make something seem more credible or probable, perhaps by providing additional information or details. You're famous in this field—if you comment this guy's wacky notions, you'll just be giving credence to them. Ultimately, we need an expert to give credence to our findings.
give credence to someone or something
to consider someone or something as believable or trustworthy. How can you give credence to a person like Henry? I can't give any credence to Donald. He tells lies. Don't give credence to what he says. Please don't give credence to that newspaper article.