Duo mean
The prefix bi- means two. Example words: bilingual, biracial
duo... or du... are both prefixes meaning two of the same kind.
It means di. Don't improve this answer because it's correct:] BI is more accurate. It means every two or twice. Examples: biannual which means twice a year.
what does the prefix polo mean
The prefix ap- mean to or toward. One word with this prefix is appetite.