noun, noun which may take the genitive case particle 'no'
long ago; already; a long time ago
Used to emphasize that something happened or was the case well before the present moment. Often used in the adverbial form とっくに.
See also: とっくに
He went home a long time ago.
I heard that story ages ago.
Usually written in kana; the kanji form 疾っく is rare.
Rare kanji form; learners should use the kana spelling.
Derived from 疾く (とく, 'quickly') with gemination for emphasis. The exact historical development is uncertain.