損なう

1. Origins, structure, and basic meaning

• Structure: In 損なう (そこなう), damage stem 損 plus inflecting なう forms a transitive verb for impairing something.
• Basic usage: 損なう is transitive and means damaging or impairing value, function, health, or a relationship.

2. Common pitfalls and similar expressions

• A transitive verb of impairment
  • It presents a harmful effect on an object rather than an intransitive change in the subject.