Since this word has okurigana (hiragana attached to the kanji) you know that it's probably going to be the kun'yomi reading.
Lucky for you, the kanji readings for transitive and intransitive verbs are almost always the same. Once you learn one, you know them both! This reading is the same as 取る.
A button came off.
It might be difficult for this stain to be removed.
Renting an office in the business district will be considerably expensive, but it’s important for our image and I think it will pay for itself in about a year.