This is the 13593rd most frequent Russian word.
невыносимой
Unbearable.
Here, 'невыносимой' is used as an adjective in the instrumental case, describing the harshness or extreme condition of the heat.
Жара в пустыне была невыносимой.
The heat in the desert was unbearable.
In this sentence, 'невыносимую' is employed as an adjective in the accusative case, modifying 'боль' to represent the intensity of the pain.
Она ощущала невыносимую боль в ноге после падения.
She felt unbearable pain in her leg after the fall.
Here, 'невыносимо' acts as an adverb, emphasizing the difficulty or discomfort associated with living conditions.