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In some senses, hang-up is marked as informal. Watch for register when choosing this word.
hang-up
noun 2
Definitions
noun
1
An emotional difficulty or a psychological inhibition.
Near-synonyms: neurosis, obsession, complex
We’re said to have so many hang-ups that we don’t even talk about sex until we’re in the pub, and to need to be blind drunk before anything approaching physical contact occurs.
2
An unforeseen obstacle to progress; a hitch or delay.
Near-synonym: setback
What a hang up I got into at once! As I look back on it it's incredible that I could have been so damned dumb.
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