。
She attempted suicide.
Literal
She [topic-は] suicide [object-を] plotted.
企てる (くわだてる) is a notably formal/literary verb meaning 'to plan, to plot, to undertake' — and specifically 'to attempt' in the context of grave acts (自殺, 殺人, 反乱). The kanji 企 contains 人 ('person') over 止 ('stop') — etymologically 'to stand on tiptoe to look ahead,' projecting forward toward a goal. 自殺を企てる focuses on the planning and intent behind the attempt, distinguishing it from more clinical phrasings that frame the attempt as a completed-but-failed event.