❶. at first sight
It was nothing special about him at first sight.
❷. on second thought
(meaning: reconsider something)
I was going to buy a new car. On second thought, I decided to buy an old one.
❸. second to none
(meaning: better than anything)
The music store is second to none. Here you get everything from classical to Jazz.
❹. sixth sense
(meaning: strong intuition)
Sasha has sixth sense for movies. She knows what will happen next in the scene.
❺. forty winks
(meaning: a short snap)
I usually take forty winks after supper on weekends.
❻. in seventh heaven
(meaning: in very happy state).
Roma is in seventh heaven one she learns her marriage has been fixed.
❼. on cloud nine
(meaning: very happy)
He just bought a new sports car, he is on cloud nine.
❽. to put two and two together
(meaning: to guess something from the information available)
Manish did not tell his parents that his wife had left. But, from untidy house they put two and two together.
❾. third degree
(meaning: interrogation along with extreme torture to confess or extract some information)
Poor chap died at the police lockup after the third degree.