With what metal is copper alloyed/mixed to form

An ornament fastened to clothing with a hinged pin

The company had to curtail its expenses to avoid bankruptcy.

Select the option that can be used as a one-word substitute for the given group of words.

Stealthily done

In each of the following sentences, choose the word  opposite in meaning to the bold word to fill in the blank.

Cricket : Eleven :: Baseball : ?

Which of the following is an antonym of "gloomy"?

Select the most appropriate synonym of the given word. 

RELUCTANT

Reverie

Mercury: Planet :: Gold: ?

Cordial