Say a noun.Your partner gives a definition using a relative pronoun/adverb.

A book — It is a thing that writer write and the readers read.

A chair — It is a thing which we need when we want to sit down.

A pen — It is a thing that we use in writing.

A stone — It is a thing which we need when we built something.

A shop — It is a place where we go to buy something.

A doctor — He is a person who helps people in hospitals.

Sugar — It is a thing which makes everything sweet.

Restaurant — It is a place where we can have dinner or supper.

Cafe — It is a place where we can drink coffee or tea.