Sentence:  The Baronet owed his son a sum of money out of the <WSD>jointure</WSD> of his mother, which he did not find it convenient to pay; indeed he had an almost invincible repugnance to paying anybody, and could only be brought by force to discharge his debts. 
Meaning of the word marked with <WSD> tags:  An estate settled on a wife, which she is to enjoy after her husband's death, for her own life at least, in satisfaction of dower.