Under the German occupation regime of 1939, her home in Warsaw became part of the Warsaw Ghetto. She was arrested under the charge of having gone to the United States to spread anti-Nazi propaganda, but after a few months, she was released and returned to her home city where she and the rest of her family remained confined. There she endeavored to help others get medicine and food. She was offered help and escape several times by Polish Esperantists but refused in each case. To one Pole, well-known Esperantist Józef Arszennik, who had offered her refuge on several occasions, she explained, "you and your family could lose your lives, because whoever hides a Jew perishes along with the Jew who is discovered." To another, her explanation was contained in her last known letter: "Do not think of putting yourself in danger; I know that I must die but I feel it is my duty to stay with my people. God grant that out of our sufferings a better world may emerge. I believe in God. I am a Baháʼí and will die a Baháʼí. Everything is in His hands."