To Diagnose
する verb
診断 is a diagnosis. Make this into a verb, and you have to diagnose.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
自分で症状を診断するのは危険だよ。
Diagnosing your symptoms on your own is risky.
動物病院で犬の病気を診断してもらいました。
I had my dog's illness diagnosed at the animal hospital.
関東人か関西人かを問うクイズで、東京生まれの東京育ちなのになぜか関西人と診断されました。
Although I am Tokyo-born and raised, a quiz assessing whether participants are from Kanto or Kansai incorrectly pegged me as someone from Kansai.
その医者が私に癌だと診断するほんの少し前に、ある看護婦さんが私の事をちらっと振り返って見たんです。
Right before the doctor diagnosed me with cancer, a nurse glanced over her shoulder at me.