bitterness; distress; pain; bitterness and astringency
congestion (e.g. traffic); delay; stagnation
suffering; distress; difficulty; hardship; misery; being bogged down
traffic congestion; traffic jam; (traffic) deadlock
to have a bitter experience
ambiguous; obscure; equivocal
congestion caused by a traffic accident
alleviation of congestion (esp. traffic)