"'' well then , kiel , you 'll just have to learn . '' kiel 's face hardened , but inside he was afraid . '' i do n't know how to learn . it 's too late , is n't it ? '' he ventured . the man shook his head , then eyed the boy with a keen , steady gaze . '' no , i do n't think so , _ ..." What is the word in the blank space (_)? The answer is
kiel