How to spell thermal

Thermal is spelled T-H-E-R-M-A-L.

hear itther·mal/'θɜrmæl/adjectiveSchwa and roots

What it means: Relating to or associated with heat.

In a sentence: The thermal blanket keeps us warm in the winter.

Same family: thermometer, thermostat, geothermal, hypothermia, thermalize. If you can spell one, the shared part carries to the others.

Where it comes from: “Thermal” comes from the Greek word “thermos,” meaning “hot” or “warm.” You can see the same root in words like “thermometer” (a device that measures heat) and “thermos,” the brand name that became a common word for an insulated bottle.

Try spelling it

You will hear the word and a sentence. Type it and press Enter. Then four more words from the same level, so you know where you stand.

Words like this

geothermal · hypothermia · verdict · marital · interest rate · hilarious · permanent · therapy

Everyone has words they always get wrong. Spelling.School finds yours, shows you exactly why you miss them, and uses spaced repetition until you spell them right every time. Five minutes a day. Try five words without signing up.