attemper
transitive verb
at·tem·per
əˈtempə(r),
aˈ-
-ed/-ing/-s
1
obsolete : regulate, control, order
2
archaic
a
: soften, mitigate
b
: soothe, appease
3
a
archaic : to reduce, modify, or moderate by mixture
b
: to modify the temperature of : make (as air) warmer or colder
4
archaic : to make suitable : accommodate, adapt
5
archaic : to bring into harmony : attune
Word History
Etymology
Middle English attempren, from Middle French atemprer, from Latin attemperare to adjust, accommodate, from ad- + temperare to temper