agreement, consent, comply with
肯 centers on giving a positive response: agreeing, consenting, or complying with a request or expectation.
肯 is thought to combine 止 (foot, stop) with 月 (flesh/body), originally suggesting a physical gesture of assent or stopping to agree. The exact historical development is uncertain.
The top 止 looks like a foot stopping, and the bottom 月 is a body part. Imagine someone stopping in their tracks and nodding their body to show agreement.
For コウ, picture a person giving a firm consent by saying "OK" in a deep voice: "OK" sounds like コウ, and they comply with the request.
affirmation
assent; consent
to approve; to accept; to consent; to affirm
to consent; to allow; to accept; to agree
to consent; to allow; to accept
affirmative proposition
acknowledge; ACK
affirmative sentence
affirmative
the essential point
consent; agreement
self-affirmation; self-approval
self-esteem; feeling of self-approval