oil-harden
American
[oil-hahr-dn]
/ ˈɔɪlˌhɑr dn /
verb (used with object)
Metallurgy.
Etymology
Origin of oil-harden
First recorded in 1900–05
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
