Sentence:  A person is 'harmonic' with respect to his own generation and all even-numbered generations counting away from his own, and <WSD>'disharmonic</WSD>' with respect to odd-numbered generations. Thus a man is <WSD>disharmonic</WSD> with respect to his father and his son but harmonic with respect to his grandfather and his grandson. 
Meaning of the word marked with <WSD> tags:  Of or relating to a generation an odd number of generations distant from a particular person.