Walk together with the person for 45 min for a one-to-one open-ended talk. If possible, keep the steps count and that will an outcome in itself. Let the inputs flow out...and slowly team member will feel freer to talk.

Make sure the team knows there's no such thing as a bad idea. Foster a non-judgmental space. Share your own imperfect ideas to show that the brainstorming process is about creativity, not perfection. Directly engage them with questions like, "What do you think about this approach?" or "How would you solve this?" Value their input, acknowledge their expertise or perspective, saying I know you have great insights on this topic.

To encourage a hesitant team member to share their ideas, create an environment where they feel safe and valued by actively listening and acknowledging their contributions, no matter how small. Start by inviting their thoughts on smaller, low-pressure topics and offering positive reinforcement when they do share. Incorporate anonymous idea-sharing tools to reduce the fear of judgment, and emphasize that all ideas are welcome in brainstorming, as innovation often stems from diverse perspectives. Over time, trust will build, and they’ll feel more confident in opening up.

Maintain a friendly environment by actively encouraging their input and reassuring them that all ideas are valued, no matter how small. I would offer them the option to share ideas in email or smaller groups to reduce pressure. I would also praise their contributions to build confidence and ensure no judgment is passed during brainstorming, fostering a safe space for open dialogue. Regularly checking in one-on-one may help address their concerns about sharing ideas.

Agreed to all the suggestions Additionally, a safe environment where team can suggest anything and everything should be created. - A space where they are not fear of failures, everyone has their own conflicting fears while presenting an idea , a pressure from the team makes it only worse - Allowing them to think through, asking every individual a healthy probing questions so that the ideas mature into actionable set of activities - make use of online collaboration tools and ask the team to add in their ideas with their analysis done (if needed) - to not be picky on the minute details during the brainstorming session itself, gather as much as ideas we can get