1. in a cheerful, carefree manner without worry or concern
2. in a casual way that shows lack of proper concern or thought about consequences
Usage: often implies criticism

Examples

• She blithely ignored the warning signs and continued hiking.
• He blithely whistled as he walked to work on the sunny morning.
• The company blithely dismissed environmental concerns about their new factory.
• Children blithely played in the park, unaware of their parents’ worries.
• She blithely assumed everything would work out fine without making any plans.
• The tourists blithely wandered through the dangerous neighborhood.
• He blithely spent his savings, confident he would find another job soon.