Probably from sâpohtêw (“pass through”).
-sâp (Syllabics -ᓵᑊ)
- Used to form numerals from ten to twenty: -teen
- After a consonant, a combining vowel -o- is inserted.
- Jean L. Okimâsis (2018) Cree: Language of the plains[1], University of Regina Press, →ISBN, page 175