구먼

Well, I see — folksy realisation

Registers something you have just noticed, with a gruff and homely warmth: there's so much oil, the smell is unreal, this is the East pagoda and that's the West, you're good — did you practise at home? It is a variant of 군 and a sibling of 구만, and it reads as older, unpolished speech rather than the way a young person would talk. All these lines are plain speech.

Register: casual, older-sounding