If you loved Knife in the Water, try Repulsion
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Roman Polanski, and they both carry the dread mood tag, and they sit in Drama / Thriller territory. If that's the register that drew you to Knife in the Water, the second film will land in a comparable space — through a different lens.
dread
What Repulsion is
London flat, summer heat, a ticking clock. A sister departs, a roommate remains, alone with her fears. Polanski shoots the collapse of a fragile mind.
Ask 
ChatGPT
Claude
Grok
Le Chat
Perplexity
for a deeper bridge
ChatGPTClaudeGrokLe ChatPerplexity