adjective

insupportable

in-suh-POR-tuh-bul/ˌɪnsəˈpɔːrtəbl/

Too burdensome to be supported.

The drilling noise is insupportable to the pedestrian covering her ears and recoiling.

A pedestrian cannot endure the noise of nearby pavement drilling: she clamps both hands over her ears, grimaces, and recoils away while the operator works in hearing protection.
Etymology

Carrying something from underneath gives the image of bearing its weight. Applied to pain, difficulty, or unreasonable demands, “not capable of being borne” means too much to endure.

In context

Enhanced Public Domain86:30
my attention was fixed upon every object the most insupportable to the delicacy of the human feelings I saw how the form of man was degraded and wasted I beheld the corruption of death
1800s Fiction Audiobook: Mary Shelley - Frankenstein

More examples

  • Without additional staff, the workload becomes insupportable.
  • The afternoon heat is insupportable in this tiny apartment.
  • She finds the loneliness insupportable after months away from home.

Similar words

unbearable
Emphasizes suffering that a person can no longer endure.
intolerable
Often suggests conditions so bad they should not continue.