IPA: /sɪnˈtɪlə/
KK: /sɪnˈtɪlə/
A very small amount of something, often used to refer to a tiny trace or hint.
There was not a scintilla of doubt in her mind about the decision.
Scintilla is derived from the Latin word "scintilla" (meaning spark or glimmer). The term refers to a small amount or trace of something, often evoking the idea of a tiny spark of light.
Think of a tiny 'spark' ('scintilla') that represents a small amount of something — that's why scintilla means a trace or spark.