对某人失望的英文：
be disappointed with sb.

The act of disappointing.
使人失望的行为

The poorness of the play disappointed the audience.
这出剧的拙劣令观众失望了。

This disappointed his plans.
这件事使他的计划落空了。

The trip was insipid and disappointing.
这次旅游平淡无奇，令人失望。

Once again he was disappointed in love.
他又一次失恋了。