v. /up spring"/ , n. /up"spring'/ , v. , upsprang or upsprung, upsprung, upspringing , n.
v.i.
1. to spring up.
2. to come into being or existence; arise: Prosperity began to upspring after the war.
n. Archaic.
3. growth or development.
4. a coming into existence; origin.
[ bef. 1000; (v.) ME upspringen, OE upspringan; (n.) ME; OE upspringe. See UP-, SPRING ]