"alienation of affection, attachment, or good will; estrangement," especially "disloyalty to a government or existing authority," c. 1600; see dis- + affection. Perhaps from or based on French désaffection.
the widespread disaffection of the troops
disadvantage
disadvantaged
disadvantageous
disaffect
disaffected
disaffection
disaggregate
disagree
disagreeable
disagreement
disallow