Telephone, Phone
noun, の adjective, verbal noun
An electricity talk. What is this witchcraft? The only way to talk via electricity is with a telephone.
でんわ
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.
山下先生から電話です。
It's a phone call from Yamashita-sensei.
電話で「ありがとう」とお母さんに言いました。
I told my mother "thank you" on the phone.
それ、正しい電話番号ではないよ。
That's not the right phone number.