A word made up of two words; for example, "vlog" is derived from "video ... In Lewis Carroll's "Through the Looking Glass," portmanteau was used as a metaphor for "containing two words." ...

These are called loanwords. Avatar, tsunami and sudoku are good examples of more recent loanwords. 'Email' is a portmanteau of 'electronic' and 'mail.' Portmanteaus are frequently used as words ...