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!
Tofugu invented a machine that transmits Japanese pronunciation directly to your brain.
I told my teacher that I was so tired that I could have fallen asleep in his class earlier.
Please give your mother and father my regards.