frugal and prudent What's the difference between them? Does frugal have some negative meaning?

Common North American idioms Can you list some common North American idioms?

What are the relationships between "testis", "testicle" and "testes"?

What is the meaning of "get your feet wet"?

Do they have the similar meaning? "come hell or high water" and "by hook or by crook"

Do "keyed up" and " on pins and needles" have the similar meaning?

What does it mean by "put my two cents in"?

Why after "It's high time" we have to use past tense clause? Any other phrases have the similar situation?

What does "pull a fast one" mean and how to use it?