I haven't slept for three days and I'm exhausted.
I thought, I must not die here.
The meeting continued without any sign of ending and the employees were getting fed up.
If you tear (てる) up a fruit, its life is going to end. Fruit can't go on when they've been beaten up so much.
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:
The fruit's life is about to end and you laugh, "Hahahaha (は)!" And then you start tearing at it more! What's wrong with you? Weirdo...