Conversion
A word formation process where a word changes word class without adding morphological markers. Conversion creates new words from existing words.
Real World
When Twitter launched, 'tweet' was only a noun (a bird's chirp), but users rapidly converted it into a verb — 'I'll tweet that' — demonstrating how technology drives zero-derivation in modern English.
Exam Focus
Name the process as 'conversion' or 'zero-derivation' and identify both original and new word classes for full marks.
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