WordGarden.ioanneal
C2Pronunciation
UK
US
- /əˈnil/
Meanings
Verb
to heat and slowly cool metal, glass, or similar material to reduce brittleness or internal stress
for complementary DNA, RNA, or similar strands to bind together by base pairing
Beyond the definition
Imagine a blacksmith working with metal. They heat it, then let it cool slowly. That process is annealing. It's about making something less brittle and more workable—relieving internal stresses built up during shaping. But annealing isn't just for metals; glass is also annealed so it’s less likely to crack or shatter from hidden stress. In a broader sense, "annealing" can refer to refining or toughening something through an ordeal. Unlike a fine wine that simply ages, a person's character anneals through the "heat" of difficult experiences, emerging steadier and more resilient.
To anneal means to heat a material—typically metal or glass—and then cool it slowly (in a controlled way) to relieve internal stresses and make it less brittle. With metals, annealing often also reduces hardness and increases ductility (the ability to be drawn into a wire). Think of bending a paperclip repeatedly; it becomes brittle and eventually snaps. Annealing is like giving the metal a chance to "relax" after being bent and shaped, making it more flexible and less prone to cracking.
Originally, annealing was a process used by blacksmiths and metalsmiths to make their materials easier to work with. A piece of steel might be annealed before machining or before further heat treatment. Glass is also commonly annealed to reduce internal stress that can make it crack unexpectedly—think of oven-safe glass cookware.
However, the meaning has expanded beyond just physical materials. In a more figurative sense, "anneal" describes a process of strengthening or refinement through time and experience. A partnership tested by setbacks might anneal over years, becoming steadier and more resilient. Or a complex idea might anneal in your mind as you consider it from different angles.
The word comes from the Old English onælan, meaning "to set on fire" or "burn." So whether you're talking about metalworking, glassblowing, or personal growth—to anneal is to change something through carefully controlled heat and cooling (or its metaphorical equivalent), easing brittleness and building steadiness over time.
Examples
- 1
Metalworking
The blacksmith heated the steel to anneal it before hammering it flat.
- 2
Glassmaking
Glass makers anneal finished pieces slowly so they will not crack as they cool.
- 3
Materials
The engineer specified annealed copper wire because it bends more easily during assembly.
See also
Forms and spellings
4 forms open this card.
Main spelling
- annealverb
Forms
- annealing-ing formverb
- annealedpast tenseverb
- annealsverb