The first thing Snape asks Harry is “Potter! What would I get if I added powdered root of asphodel to an infusion of wormwood?” According to Victorian Flower Language, asphodel is a type of lily meaning ‘My regrets follow you to the grave’ and wormwood means ‘absence’ and also typically symbolized bitter sorrow. If you combined that, it meant ‘I bitterly regret Lily’s death’.
“Leo had slammed his hand on the table countless times and he moved his hand further and he crushed a crystal cordial glass. Blood was dripping down his hand. He never broke character. He kept going. He was in such a zone. It was very intense. He required stitches.”