居然 (jū rán): Unexpectedly (Adverb) — Meaning & Stroke Order

He actually got such an easy question wrong.

He unexpectedly failed to fulfill any of the promises he made initially.

This seemingly simple plan unexpectedly requires such complex coordination.

The weather forecast said it would rain today, and it actually did.

To my surprise, he made a reservation today at the restaurant I just casually mentioned yesterday.