Describes a process that causes continuous distress or harm over time.

Emotional Impact

'Gnaw at' indicates a gradual, often unnoticed problem that worsens.

Persistent Effect

Metaphorically connects to the literal act of an animal chewing persistently.

Refers to annoying thoughts or worries that one can't easily dismiss.

Indicates a lingering sense of uncertainty or skepticism.

Often describes minor irritations that continue over time and are hard to ignore.