vitiate
- v corrupt morally or by intemperance or sensuality
- v make imperfect
- v take away the legal force of or render ineffective
- The foreign secretaries saw a series of feuds and bickerings between their countries which threatened to vitiate the ensuing summit talks.
- We're obviously not talking Stalag 17 or The Great Escape here, but stray thoughts of movies in that mode inevitably tug at our minds and somewhat vitiate the power of this one.
- If key decisions are made informally at unprepared meetings, the tendency to be obliging to the President and cooperative with one's colleagues may vitiate the articulation of real .