Part of speech: Adjective

Definition: very neat and clean

Source: http://www.merriam-webster.com/dictionary/nattily?show=0&t=1387343373

Meaning: I encountered this word while reading tunnel rats in the lines The explorers began noticing a nattily dressed man carrying a suitcase. This means while Yonette was going the manhole explorer noticed a very neat and clean man who was also interested in going in the manhole