1. in a frail manner; weakly or delicately
2. in a manner showing moral or physical weakness; susceptibly

Examples

• The elderly woman walked frailly down the hallway, gripping the railing.
• He spoke frailly, his voice barely audible above the noise.
• The bridge's frailly constructed supports worried the engineers.
• She frailly resisted the temptation to abandon her diet.
• The patient's frailly condition required constant medical attention.