in ‧ suf ‧ fe ‧ ra ‧ ble /ɪnˈsʌf ə rəb ə l/ BrE AmE adjective
[ Word Family: noun : ↑ sufferer , ↑ suffering , ↑ sufferance ; verb : ↑ suffer ; adverb : ↑ insufferably ; adjective : ↑ insufferable ]
extremely annoying or unpleasant SYN unbearable :
an insufferable bully
The heat was insufferable.
—insufferably adverb