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Prefix

usgb/ˈpriːfɪks/Volume
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Meaning AlterationPlay
Prefixes transform words into antonyms or give them a new meaning. SlideAdding 'dis-' to 'agree' forms 'disagree', indicating opposition.
LampPro Tip 2/3
Common PrefixesPlay
Some prefixes are really common and appear in many English words. Slide'Pre-' is a common prefix in 'preview', meaning 'before'.
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No Spelling ChangePlay
Adding a prefix doesn't typically change the spelling of the root word. Slide'Un-' + 'known' stays as 'unknown' with no spelling change.