
Niggling
Subtle Impact
Emphasizes a small problem's persistent nature, which can affect mood or performance over time.

The niggling error in the report eventually led to a bigger issue.
Not Serious
Usually not a serious problem but can be distracting or cause slight annoyance.

She had a niggling concern about the decorations not being perfect.
Emotional Tinge
Can imply an emotional disturbance like irritation or uneasiness beyond physical discomfort.

A niggling sense of unease kept him awake at night.
Compare with
FussyImportantInconsequentialMinorNegligiblePettySignificantTrivial
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