The adverb is on the verb in this sentence, not the noun. You are saying I thank you, and how I thank you is kindly (gratefully or with grace). As opposed to thanking someone snidely or backhandedly.
Kindly could also be a shortening of “for your kindness” depending on the history of this phrase.
The adverb is on the verb in this sentence, not the noun. You are saying I thank you, and how I thank you is kindly (gratefully or with grace). As opposed to thanking someone snidely or backhandedly.
Kindly could also be a shortening of “for your kindness” depending on the history of this phrase.
This is exactly what I’m saying - “How I thank you is kindly” i.e. “I’m being kind in the way I’m thanking you”