unpainful

例句：

1. 1. The surgery was unpainful for the patient.
   手术对病人来说不痛苦。
2. 2. She felt unpainful after the operation.
   手术后她感觉不到疼痛。
3. 3. The medication made her feel unpainful.
   药物让她感觉不到疼痛。