。
She scared the cat away.
Literal
She [topic-は] cat [object-を] threaten-and drove-away.
Two verbs linked by te-form. 脅かす ('threaten, scare') sets up the means; 追い払う ('drive away,' a compound of 追う 'pursue' + 払う 'pay/clear') gives the result. ~払う is a productive compound verb-ending for forcefully clearing, paying off, or driving out: 売り払う ('sell off'), 振り払う ('shake off').