setback

Từ điển WordNet v3.1 - WordNet Dictionary

noun

an unfortunate happening that hinders or impedes;
something that is thwarting or frustrating (Freq. 3)
• Syn:
reverse, reversal, blow, black eye
• Derivationally related forms:
set back
• Hypernyms:
happening, occurrence, occurrent, natural event
• Hyponyms:
whammy