The mouse quickly cut the cord with its sharp little teeth.
Қайчӣ асбоби тези дӯзандагӣ буда, аз замонҳои қадим маълум аст.
Scissors are a sharp sewing tool that have been around since ancient times.
Antonym: кунд (blunt)
Alternate meanings –
тез: quickly (adv.), fast (adj.)
Корди тез тез мебурад. A sharp knife cuts quickly.
зеҳни тез: sharp mind
кунҷи тез: sharp corner
There are a lot of compound words that use тез, using all three definitions of тез. Reading through lists of words like that is a great way to increase your vocabulary. You can see a list of compound words with тез in this Tajik dictionary, page 341.