Sentence:  Thus, a person living with a family to whom he is not related is termed "a <WSD>fremd</WSD> body." If it were asked, "Is he akin to you?" the answer would be, "Nawe, he's <WSD>fremd</WSD>," i.e. "he's one of us, but not a relation." 
Meaning of the word marked with <WSD> tags:  Not akin; unrelated.