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tam·per1

tamper1

 
 
pronunciation:
taem pr
part of speech: verb
inflections: tampers, tampering, tampered
definition: to meddle in something when one is not asked, and so change or damage it (usually followed by "with").
Someone tampered with my bicycle and now the brakes don't work.
synonyms:
fiddle
similar words:
fidget, fool, monkey, play
derivation: tamperer (n.)