1. to do less than what is required or expected; to perform inadequately
Usage: rare
2. to cook insufficiently
Usage: cooking

Examples

• Don’t underdo the preparation for your presentation.
• She tends to underdo her training before marathons.
• The chef warned not to underdo the chicken.
• It’s better to slightly overcook than to underdo the meat.
• He underdid his research and missed important details.