To Transmit, To Tell, To Pass Down, To Convey
transitive verb, ichidan verb
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means transmit, so the verb version is to transmit or to tell something.
つたえる
Since this word has okurigana (hiragana attached to the kanji) you know that it's probably going to be the kun'yomi reading, which you didn't learn with the kanji. Here's a mnemonic to help you: You want to transmit a signal to the stars (つた)! Trying to tell your message to anyone on earth would be too boring and too easy. Aim your message at the nearest star and transmit it into space!
これから会えますか？メールでは上手く伝えることができないんです。
Could we meet up? I wouldn't be able to convey my message over an email.
先生には、トイレに行きたいってちゃんと伝えてたんだよ。
I told my teacher that I wanted to go to the bathroom.
お父様とお母様にも、よろしくお伝えくださいね。
Please give your mother and father my regards.