kirn1

[kurn; Scot. kirn] /kɜrn; Scot. kɪrn/
verb (used with object), verb (used without object)
1.
to churn.
noun
2.
a churn.
Also, kern.
Origin
1300-50; Middle English kirne (noun) < Scandinavian; compare Old Norse kirnuaskr a churn; cognate with churn

kirn2

[kurn; Scot. kirn] /kɜrn; Scot. kɪrn/
noun, Scot. and North England
1.
a harvest celebration; a feast or party celebrating a successful harvest.
2.
the harvesting of the last handful of corn, noting either the end of the harvest season or the winning of a race against other reapers.
Compare kemp1 (def 2).
Also, kern, kurn.
Origin
1770-80; origin uncertain; perhaps akin to corn1