spiritsomespiritsome

Spiritsome comes from Middle English spirit ‘life, vital breath’, from Old French espirit ‘spirit’, and ultimately from Latin spīrō ‘to breathe, draw breath, respire’.

1. Latinc. 75 BCE–200 CEspīrō¹‘to breathe, draw breath, respire’
2. Latinc. 75 BCE–200 CEspīritus¹‘air, breath, breathing’
3. Old Frenchc. 842–1400espirit¹‘spirit’
4. Middle Englishc. 1150–1500spirit¹‘life, vital breath’
5. English1500–presentspirit¹
6. Englishearliest quotation 1876spiritsome¹

1. ¹ Wiktionary, English spiritsome
2. Earliest quotation in Wiktionary’s entry: 1876, Adeline Dutton Train Whitney: “They kept rising upon us like that, all day;…”.

Earlier history uncertain. See Wiktionary.