What do we often mean by "loneliness, widowhood, disability, disability"?

Widow: Widow, a woman who has not remarried after her husband's death.

Disability actually refers to disability, if subdivided.

Residual: incomplete and defective; Refers to his old age.

Obstacles: originally meant to block, block, such as obstacles, obstacles.

Therefore, the focus of disability is the deformity of limbs, such as broken limbs.

Obstacles focus on mental and intellectual imperfections, such as cerebral palsy.