@cyberlyra interestingly enough for people who speak German: It is extremely common to create nouns out of verbs and combine them with other words. Most often you will recognize the different words and their combined meanings effortlessly. „Keener“ seems to be a very logical word to me. I‘m not an English native speaker myself so it would take me a moment longer to recognize the word might not be from a dictionary. But knowing the context is all it takes.