Sentence:  This time was most dreadful for Lilian. Thrown on her own <WSD>resources</WSD> and almost penniless, she maintained herself and paid the rent of a wretched room near the hospital by working as a charwoman, sempstress, anything. In a moment she had dropped to the level of a casual labourer. 
Meaning of the word marked with <WSD> tags:  A person's capacity to deal with difficulty.