Meaning

noun material for starting a fire

noun the courage to carry on

origin1530, blend of spark + funk (obsolete, “spark”). Funk (“spark, touchwood”) is from Middle English funke, fonke (“spark”), from Old English *funca (“spark”), from Proto-West Germanic *funkō, from Proto-Germanic *funkô (“spark”), from Proto-Indo-European *(s)peng- (“to shine”), and is akin to Middle Low German funke, fanke (“spark”), Middle Dutch vonke (“spark”), Old High German funcho, funko…

Etymology from Wiktionary, CC BY-SA 3.0