temper

Latin

to moderate, to mix properly, to soften

Variants:tempertemperare

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About This Root

The root temper comes from Latin temperāre, meaning "to mix properly, to combine in the right proportions, to moderate, to restrain." Picture a Roman craftsman blending wine with water, or a smith controlling the heat of a furnace: the whole idea is hitting the right balance — not too much, not too little. The word is closely tied to tempus ("time, season"), the same root behind temporary and temporal. The original sense was something like "to apportion by the season" — to mix or adjust things appropriately for the moment.

From this single idea of "balanced mixing" the family fans out in surprisingly different directions:

- temper: originally "the right mixture of qualities" in a person — your inner blend. From there it slid to mean disposition (an even temper, a hot temper), and then narrowed in everyday speech to anger itself ("lose your temper"). In metalworking it kept the literal sense of controlled adjustment: to temper steel is to reheat and cool it so it reaches the right hardness. As a verb it also means to soften or moderate — "temper criticism with kindness."
- temperature: the degree of heat or cold — literally "the proportion of warmth," the measured result of how heat is blended.
- temperament: your natural inner mixture of qualities — a person's built-in emotional blend (medieval medicine thought it was the mix of the four bodily "humors").
- temperate: well-mixed, balanced — hence mild (a temperate climate, neither hot nor cold) and self-restrained (temperate habits).
- temperance: the quality of restraint and moderation; it became the banner word of the 19th-century temperance movement against alcohol, so it now often means abstinence.

A few relatives wander off: distemper (dis- = "away from" + temper) literally means "out of proper balance" — once a word for any imbalance of the humors, now mainly the animal disease (canine distemper) and a kind of water-based paint. Even-tempered simply welds even onto temper: someone whose inner blend stays level.

The pattern to remember: every temper word circles back to proportion and balance. Heat balanced → temperature; qualities balanced in a person → temperament/temper; behavior balanced → temperate/temperance; metal balanced → tempering steel.

From Latin temperāre (to mix properly, moderate, restrain). The core idea is achieving the right balance: temper (disposition, or to harden metal by controlled heating), temperament (one's natural mix of qualities), temperate (moderate in climate or behavior), temperature (degree of heat), and temperance (self-restraint).

Memory Tip

Think of a chef tempering a sauce — adjusting and blending until it's perfectly balanced, not too hot, not too sharp. Every temper word is about getting the right mix: a person's temper (their inner blend), the temperature (the blend of heat), being temperate (well-balanced behavior). Lose that balance and you "lose your temper."

Core Words Deep Dive

The few words from this family worth telling in full — one by one.

temper

The most surprising member: temper once meant the *balanced mixture* of qualities inside a person. That blend became 'disposition' (an even temper), then everyday speech narrowed it to anger alone — so 'lose your temper' literally means losing your inner balance. Metalworking preserved the original sense intact: to temper steel is to reheat and cool it into the right hardness. As a verb it also means to soften or moderate ('temper justice with mercy').

temperature

Temperature is simply 'the proportion of heat' — the measured result of how warm or cold something is, the degree to which heat is blended in. The same root that gives 'the right mixture' gives the number on your thermometer. Note the everyday medical sense: 'to have a temperature' (BrE) means to have a fever, an *abnormally high* one.

temperament

Your temperament is your built-in emotional blend — the mixture of qualities you're born with. Medieval medicine took this literally: temperament was thought to be the proportion of the four bodily 'humors,' which supposedly set whether you were calm, fiery, gloomy, or cheerful. The medical theory is gone, but the meaning stuck: one's innate, lasting character.

temperate

Temperate means 'well-mixed, balanced,' which splits into two everyday senses. Of climate: mild, neither hot nor cold (a temperate zone). Of behavior: self-restrained, moderate (temperate in his drinking). Both are the same image — a comfortable middle, nothing in excess. Its opposite intemperate keeps the 'lacking restraint' sense.

Related Roots

modSimilar

Both circle around moderation and measure. mod (from modus, 'measure, limit') gives moderate, modest, modify — staying within bounds. temper (from temperāre, 'mix properly') is about blending things into balance. Quick test: keeping within a limit → mod; mixing into the right proportion → temper.

temporCognate

temper and tempor share the Latin source tempus ('time, season'). temperāre originally meant 'to apportion by the season' — to mix appropriately for the moment. tempor kept the time sense (temporary, temporal, contemporary); temper drifted to the idea of balanced mixing.