Doctor
Physician
noun
Someone who works in medicine is a doctor.
いしゃ
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.
今日は医者に行かなくちゃいけない。
I have to go see a doctor today.
ある夜、とあるあやしいレストランに、もくもくとサメを食べる三人の医者がいました。
One night, in a shady restaurant, there were three doctors stuffing themselves with shark.
僕は医者になりたいけど、人に触ることが嫌いなんだ。それってやっぱり問題かな？
I want to be a doctor, but I hate touching people. Do you think that will be a problem?