involving or requiring a great deal of work, effort, and care
This is a hard problem to solve.

one of a group of people or things that belong together because they have something in common
I read many different kinds of books.

(always followed by a prep. or adv.) to have one's home in a particular place or with particular people
The family lives in a nice house by the sea.

an artistic piece of writing that usually has short lines and particular patterns of word emphasis, and often uses formal or literary language
I expressed my feelings about nature in a poem.

a flat raised area in a theatre where people speak or perform for an audience
The audience threw flowers onto the stage.

to know the meaning of the words that someone is saying or the language that he or she is speaking
This book is too difficult for me. I can't understand it, at all.

a person who has writes something, or who writes in a particular way
He is a very famous writer who has written many books.