hairpinbend
nounUK /ˈheəpɪn bend/
US /ˈherpɪn bend/
A hairpin bend is a very sharp turn in a road that looks like a bent hairpin.
The bus slowed down as it went around the hairpin bend.
OTHER MEANINGS
2. A sharp change in direction in a path or track.
The hiking trail had a hairpin bend near the top of the hill.
3. A sudden change in a plan or situation.
The story takes a hairpin bend when the hero loses his map.
4. A bend in a river or pipe shaped like a hairpin.
The river makes a hairpin bend just past the old bridge.