incongruity

1. N-VAR The incongruity of something is its strangeness when considered together with other aspects of a situation. 不協(xié)調(diào); 不適宜; 不相稱[正式] [oft N 'of' n]

She smiled at the incongruity of the question. 她麪對這樣突兀的問題露出了微笑。