Sentence:  In <WSD>pachydermic</WSD> idiocy the symptoms are more decided and the appearance more distinctive. In the cretin the hands are of a more normal shape, whereas in the <WSD>pachydermic</WSD> idiot the fingers are lumpy and the hands swollen. 
Meaning of the word marked with <WSD> tags:  Characterized by or characteristic of pachydermy.