An important Buddhist concept. It is commonly translated as “suffering”. It refers to the fundamental discomfort, ranging from problematical, to unsatisfactoriness, to extreme painfulness, of worldly life.
Dukkha can be paired with “sukha” – sweet – the true ease of life when ignorance is lost.
I have read that its core meaning is “sourness”. Other references say that its core meaning is “a wheel out of kilter.’ Both sound good 🙂
More about dukkha;
( sa: duḥkha ; bo: duk-ngel སྡུག་བསྔལ་ )