(SUDDEN) [adjective] [before noun] -r, -st - sudden and unpleasantIt was a rude shock/surprise to us to learn the awful truth about our son.We had a rude awakening (= unpleasant shock) when we saw the amount of our phone bill.
RUDE
Meaning of RUDE in English
Cambridge English vocab. Кембриджский английский словарь. 2012