The manager assured staff that rumors about upcoming layoffs were completely unfounded.

經理向員工保證，關於即將裁員的傳言完全是無中生有。

Customer complaints about hidden fees on our invoices turned out to be unfounded.

顧客抱怨我們的發票有隱藏費用，結果證實毫無根據。

Investors' fears of a delayed shipment proved unfounded when the cargo arrived on time.

貨物準時抵達，證明投資人擔心出貨延誤是多慮了。