He likes to take a walk in the park at dusk.

He is taking sedatives to control his stress.

He is an expert in psychiatry.

His father was diagnosed with schizophrenia in the past.

His brother was diagnosed with schizophrenia a long time ago.

He has psychopathy, making it difficult for him to understand social rules.

He is known as an expert in psychoanalysis.

My brother works as a psychiatrist.

In Japanese grammar, postpositions play an important role.

A back vowel is a sound where the back of the tongue approaches the palate.