слегла

became bedridden, fell ill

s ⁽ʲ ⁾ lʲ ɪ ɡ ɫ a → слечь
с away, down, off, or together; often marking completed action + лег lie down, go to bed + ла past tense, feminine singular
verb · feminine singular · past indicative Rare #44,309
became bedridden, fell ill
RU: Она слегла с высокой температурой.
EN: She became bedridden with a high fever.

Марита слегла от рака.

Marita fell ill with cancer.

— Таинственная река (2003)

Роза слегла с гриппом.

Rosa came down with the flu.

— Поговори с ней (2002)

Она слегла с лихорадкой.

She came down with a fever.

Она слегла с гриппом.

She came down with the flu.

— Любовь – болезнь (2017)