guarantee

The constitution of the country guarantees the right of all citizens to freedom of assembly.

(Chinese) 该国宪法保障所有公民享有集会自由的权利。

The travel agency cannot guarantee that the flight will arrive on time during the heavy blizzard.

(Chinese) 旅行社无法保证航班在强风雪天气中能准时到达。

This high-end smartphone comes with a two-year guarantee covering all manufacturing defects in parts and labor.

(Chinese) 这款高端智能手机附带两年保修，涵盖零件和人工的所有制造缺陷。

The customer requested a refund because the blender stopped working while it was still under guarantee.

(Chinese) 客户要求退款，因为搅拌机在保修期内就坏了。