Aunt Jennifer has been living her life in accordance with the rules laid down by her husband. Her life lacks expression and is overburdened by the demands and duties of her married life. Although old and weak, she still has to face oppression by her husband. These are the ordeals that the poet talks about.
The use of word 'ringed', in the poem, is significant and appropriate because it correctly represents the vicious circle from which Aunt Jennifer is unable to free herself. The word 'ringed' not only indicates that she is wearing her wedding ring but also that she is bound by the responsibilities, fear and oppression of her marriage for entire life and, probably, after it too.