particle
not only; not just
Particle used to add an additional, often surprising or emphatic, element. Similar to だけでなく but often carries a stronger sense of 'not only that, but even...'. Followed by も, まで, or さえ.
See also: 許りでなく
彼は英語ばかりか中国語も話せる。
He can speak not only English but also Chinese.
その店は値段が高いばかりか、サービスも悪い。
Not only is that store expensive, but the service is also bad.