How to spell threshold

Double letters

The spelling threshold has one H in the middle, and threshhold adds a second. It reads thresh-old: the H that ends thresh is the only one, and no hold is hiding inside the word.

Not every consonant doubles. A double is there for a reason: often an added ending, sometimes the word's history. Where neither applies, the letter stays single.

noun. a strip of wood or stone at the bottom of a doorway

• accommodate
• address
• aggressive
• broccoli
• committee
• embarrass
• harass
• inoculate
• millennium
• necessary