Castles in the air

To make umbrage

He is <u><em>not worth his salt</em></u> if he fails at this juncture.

He is always <u><em>picking holes</em></u> in every project.

Though he has a lot of money, yet all his plans are <u><em>built upon sand</em></u>.

He <u><em>took to heart</em></u> the death of his wife as he was very much attached to her.

To have full hands

To save one's face

To get into hot waters