I naturally started to don my "kill the technician" armor, preparing for a loud but unintelligible assault on the jerk.

我自然而然地披上“杀死技术员”的铠甲，准备向这个混蛋发起嘹亮但难以理解的攻击。

youdao

A lot of the jargon they use is unintelligible to outsiders.

他们所用的大量行话是外人听不懂的。

《牛津词典》

Over the last four centuries, linguistic contributions from the Irish and other settlers have produced a version of English that in its purest form is unintelligible to those who "come from away".

过去四百年来，爱尔兰人和其他定居者也加入自己的语言，这样产生的英语，即使以最纯洁的形式出现，对那些“远道而来”的人来说还是难以理解。

youdao

Mr. KAHLID KANGE (Rescue Worker): (Unintelligible) a huge (unintelligible).

NPR: Lebanon Hosts U.S. Diplomat for Conflict Talks

And what we had instead was a rush to judgment, and they're going along with the plans of the developers so that we were not able to explain to the people in this city that this is a scheme by (unintelligible) a capitalist to make money off of the suffering of people here in New Orleans.

NPR: Politicians, Protesters Clash Over N.O. Housing Demolition

Investors who use to (unintelligible) a yearlong CDs won't touch anything longer than a few months.

NPR: Lehman Bros. Earnings Ease Market Fears