Collocations for unbearable - adj.

be, feel, seem
become, get
make sb/sth
His arrogance made him absolutely unbearable.

find sb/sth
They found the heat unbearable.

absolutely, just, quite (esp. BrE)
completely, totally (both esp. AmE)
almost, nearly

Unbearable is used with these nouns:
heat, pain, sorrow, strain, suffering, suspense