I’m searching for my grandmother. She has Alzheimer's and hasn’t come home since yesterday.
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means search so the verb vocab version is to search for.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: You're searching all around for a "sagger" (さが) on your body. This is a flap of skin that is sagging on your body really far, and you probably should get it removed.