。
She tried to take her own life last night.
Literal
She [topic-は] last-night suicide try-to-do.
A heavy sentence treated with care. 自殺 ('suicide') is a Sino-Japanese compound (自 'self' + 殺 'kill') that takes する as the verbal phrase 自殺する. The volitional + とする pattern (しようとする) here marks an attempt — 'tried to commit suicide.' Suicide is a serious topic in Japan, with high public health attention; vocabulary in this domain is often handled with euphemisms in everyday writing (自分の命を絶つ 'take one's own life') though the compact 自殺する appears in news and clinical contexts.