the word 'tanka' is a loanword borrowed directly from japanese, where it is written as 短歌. the japanese term itself is a compound of 'tan' (短), meaning 'short', and 'ka' (歌), meaning 'song' or 'poem'. this etymology reflects its distinction from the longer 'choka' (長歌) form. entering english in the late 19th century, the word retained its original japanese spelling and refers specifically to the traditional five-line, 31-syllable verse form that has been central to japanese poetry for over a millennium.

this word is a direct loanword from japanese. it is not segmented into meaningful morphemes using english or western linguistic conventions.