Choose the appropriate word which can be substituted for the given sentence: '$A$ man who always thinks of himself'.

Choose the appropriate word which can be substituted for the given sentence: $A$ person who remains confident or hopeful about the success of something.

Choose the appropriate word which can be substituted for the given sentence: $A$ paper written by hand.

Choose the appropriate word which can be substituted for the given sentence: To slap with a flat object.

Choose the appropriate word which can be substituted for the given sentence: 'One who has little faith in human sincerity and goodness'.

Choose the appropriate word that can be substituted for the given sentence: An instrument for measuring atmospheric pressure.