Learn how to say Spectre correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word spectre:
a dread of spectres and witches affected every aspect of daily life
something widely feared as a possible unpleasant or dangerous occurrence:
the spectre of nuclear holocaust
early 17th century: from French spectre or Latin spectrum (see spectrum)
Remember that spectre ends with -re (the spelling specter is American).