They have given their pleasant things - Jerusalem is compared to a woman brought into great straits, who parts with her jewels and trinkets in order to purchase by them the necessaries of life.
Sigh seek - Are sighing are seeking. The words are present participles, describing the condition of the people. After a siege lasting a year and a half the whole country, far and near, would be exhausted.
To relieve the soul - See the margin, i. e. to bring back life to them. They bring out their jewels and precious articles to obtain with them at least a meal.