What are the meaning of prefixes un mis re dis bi in pre tri?

You're asking about common prefixes in English! Here's a breakdown of their meanings and some examples:

un-

* Meaning: Not, opposite of, lacking

* Examples: unhappy, unlock, unfair, unable

mis-

* Meaning: Wrongly, badly, incorrectly

* Examples: misbehave, misunderstand, misspell, misinterpret

re-

* Meaning: Again, back, anew

* Examples: redo, rewrite, reread, rebuild, return

dis-

* Meaning: Not, opposite of, lack of, absence of, removal

* Examples: disagree, disappear, dislike, disapprove, disconnect

bi-

* Meaning: Two, twice, both

* Examples: bicycle, bilingual, biannual, bisect, binoculars

pre-

* Meaning: Before, earlier, in advance

* Examples: pregame, preview, pre-order, pre-existing, prenatal

tri-

* Meaning: Three, three times

* Examples: triangle, tricycle, triathlete, tripod, trifold

These are just a few of the many common prefixes in English. Understanding prefixes can help you decipher the meaning of unfamiliar words and improve your vocabulary.