医者|いしゃisha[0]heiban (flat)

1. noundoctor; physicianusu. as お医者さん in polite speech
   医者いしゃは彼かれの折おれた足あしをついだ。↗

   The doctor set his broken leg.

• SynonymドクターCasualA loanword meaning doctor, but also PhD. Common in speech; 「医者」 is the most ordinary term and plainer in tone.
• Synonymお医者さんおいしゃさんCasualA warm, friendly term, used mostly with children or in everyday chat. 「医者」 is more neutral, and said to a doctor's face it can sound a bit too casual.
• Synonym医師いしWrittenFormal and legal term for a licensed physician, as in 「医師免許」; typical of written and official language. 「医者」 is the everyday spoken word.
• Antonym患者かんじゃNeutralSomeone receiving medical treatment—the other side of the doctor-patient relationship from 「医者」.

For everyday talk about a doctor, 「医者」 is the default. Use 「医師」 in formal or legal contexts, 「お医者さん」 for a warm, friendly tone, and 「ドクター」 as a colloquial loanword that can also mean PhD. 「患者」 is the patient, the other side of the relationship.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 職業しょくぎょうとして医療いりょう行為こういを行おこなう者もの。医師いしの平易へいいな口語こうご的てき表現ひょうげん。