Fill in the blanks with words given below and change the form if necessary. ashamed sustain precious delicate concentration Asking for money as a wedding present is very practical, but can be a very __________ issue as well. Lack of sleep can have a negative effecct on the brain, which can lead to lack of __________. His memory of the girl is __________ to him, sustaining him through the terror, the pain, and the hopelessness of life. You should be __________ of yourself for telling such lies. The love and support of his family __________ him during his time in prison.