-O


Meaning of -O in English

[-o] n suffix [perh. fr. [1]oh]: one that is, has the qualities of, or is associated with "bucko"

[2]-o interj suffix [prob. fr. [1]oh]--in interjections formed from other parts of speech "cheerio" "righto"

Merriam-Webster English vocab.      Английский словарь Merriam Webster.