So unpleasant or painful as not to be endured or tolerated
This week is becoming insufferable.
It was in far later periods and in other countries that the appearance of the dogstar was regarded as the signal of insufferable heat or prevalent disease.
It is certain that Sweden herself could never have extorted such favourable terms, yet " the insufferable tutelage " of France on this occasion inspired Charles XI.
Insufferable heat usually translates to some serious discomfort, so dressing lightly is one of the best ways to counter those effects.
After taking part in the Seven Years' War, young Villette returned in 1763 to Paris, where he made many enemies by his insufferable manners.