To Be Delivered
To Arrive, To Reach
intransitive verb, godan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means deliver so the verb vocab version here is to be delivered or to arrive. You know this one is "to be delivered" (aka it's just getting delivered, you aren't doing the delivery) because when this item arrives at your house you say "coo'" (く), it arrived.
The reading is the one you learned with the kanji: とど!
トーフグからの手紙がちょうど今届きました。
The letter from Tofugu was just delivered.
空港に置き忘れた荷物が昨日届いた。
The baggage I'd forgotten at the airport arrived yesterday.
あのバーテンダー、うちの職員に気があるみたいでさ、今日もオフィスに花束が届いたよ。
That bartender seems to have a thing for one of our staff. Another bouquet arrived at the office today.