Examples of figures of speech you can use when remembering someone who died and it brings sadness:

1. "Their absence is like a gaping hole in my heart."
2. "Their memory is a bittersweet ache that never fades."
3. "I feel their loss like a heavy weight on my chest."
4. "Their passing left a void that can never be filled."
5. "Their absence is a constant reminder of the emptiness they left behind."
6. "Their memory is a shadow that lingers in my thoughts."
7. "Their loss is a wound that never fully heals."
8. "Their absence is a dark cloud that hangs over my days."
9. "Their passing feels like a piece of me has been taken away."
10. "Their memory is a haunting presence that I can't shake."

Metaphors:

- "Their life was a flickering flame, extinguished too soon."
- "Grief is a heavy cloak that weighs down my soul."

Similes:

- "Memories of them haunt me like a persistent echo."
- "Their absence is like a gaping hole in my heart."

Personification:

- "Sadness clings to me like a relentless shadow."
- "Time heals wounds, but the scars of loss remain."

Hyperbole:

- "My world crumbled to pieces when they left."
- "I feel utterly devastated by their death."

Irony:

- "Life is too short, yet it can seem endless when filled with grief."
- "I miss them so much, even though they are in a better place."

Oxymoron:

- "A bittersweet memory that brings both joy and sorrow."
- "A present absence that leaves a tangible void."

Synecdoche:

- "Their smile, now only a memory, lingers in my mind."
- "The room feels empty without their laughter."

Metonymy:

- "I still see their favorite book on the shelf, a constant reminder of what I've lost."
- "The sound of their voice echoes in my dreams."